Title AS/NZS 3500.0:1995 National Plumbing and Drainage Code - Glossary of terms Licensee Licensed to LUU MINH LUAN on 25 Feb 2002 Conditions of use This is a licensed electronic copy of a document where copyright is owned or managed by Standards Australia International Your licence is a single user licence and the document may not be stored, transferred or otherwise distributed on a network You may also make one paper copy of this document if required Web Check-up Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited AS/NZS 3500.0:1995 Australian/New Zealand Standard National Plumbing and Drainage Code Part 0: Glossary of terms AS/NZS 3500.0:1995 This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee WS/14, National Plumbing and Drainage Code It was approved on behalf of the Council of Standards Australia on 18 August 1995 and on behalf of the Council of Standards New Zealand on August 1995 It was published on December 1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited The following interests are represented on Committee WS/14: A.C.T Electricity and Water Association of Hydraulic Services Consultants, Australia AUSTAP Australian Chamber of Commerce and Industry Australian Plumbing and Mechanical Contractors Association Brisbane City Council Department of Environment and Planning, Tas Department of Housing Local Government Planning, Qld Department of Land and Water Conservation, N.S.W Department of Lands Housing and Local Government, N.T Electricity Supply Association of Australia Gas Appliance Manufactures Association of Australia Housing Industry Association (Australia) Melbourne Water Metal Trades Industry Association of Australia New Zealand Manufacturers Federation New Zealand Society of Mater Plumbers and Gasfitters Plastics and Chemicals Industry Association (Australia) Solar Energy Industries Association of Australia South Australian Water Corporation Sydney Water Corporation Water Authority of Western Australia Review of Standards To keep abreast of progress in industry, Joint Australian/New Zealand Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary It is important therefore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto Full details of all Joint Standards and related publications will be found in the Standards Australia and Standards New Zealand Catalogue of Publications; this information is supplemented each month by the magazines ‘The Australian Standard’ and ‘Standards New Zealand’, which subscribing members receive, and which give details of new publications, new editions and amendments, and of withdrawn Standards Suggestions for improvements to Joint Standards, addressed to the head office of either Standards Australia or Standards New Zealand, are welcomed Notification of any inaccuracy or ambiguity found in a Joint Australian/New Zealand Standard should be made without delay in order that the matter may be investigated and appropriate action taken This Standard was issued in draft form for comment as DR 94176 AS/NZS 3500.0:1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Australian/New Zealand Standard National Plumbing and Drainage Code Part 0: Glossary of terms PUBLISHED JOINTLY BY: STANDARDS AUSTRALIA The Crescent, Homebush NSW 2140 Australia STANDARDS NEW ZEALAND Level 10, Standards House, 155 The Terrace, Wellington 6001 New Zealand ISBN 7262 0070 AS / NZS 3500.0:1995 PREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee WS/14 on the National Plumbing and Drainage Code, to supersede AS 3500.0 — 1990, National Plumbing and Drainage Code, Part 0: Glossary of terms Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited The Standard is primarily intended for the general water industry and for use in the interpretation of terminology used in the various parts of the National Plumbing and Drainage Code and covers water supply from the reticulation main into the premises, including hot water service systems, sanitary fixtures, drainage and their associated water and waste fittings, pipe systems and associated components Originated as AS 1355 — 1979 Previous editi on AS 3500.0 — 1990 Jointl y revised and designated AS/NZS 3500.0:1995  Copyright STANDARDS AUSTRALIA/ STANDARDS NEW ZEALAND Users of Standards are reminded that copyright subsists in all Standards Australia and Standards New Zealand publications and software Except where the Copyright Act allows and except where provided for below no publications or software produced by Standards Australia or Standards New Zealand may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from Standards Australia or Standards New Zealand Permission may be conditional on an appropriate royalty payment Australian requests for permission and information on commercial software royalties should be directed to the head office of Standards Australia New Zealand requests should be directed to Standards New Zealand Up to 10 percent of the technical content pages of a Standard may be copied for use exclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia or Standards New Zealand Inclusion of copyright material in computer software programs is also permitted without royalty payment provided such programs are used exclusively in-house by the creators of the programs Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard is amended or revised The number and date of the Standard should therefore be clearly identified The use of material in print form or in computer software programs to be used commercially, with or without payment, or in commercial contracts is subject to the payment of a royalty This policy may be varied by Standards Australia or Standards New Zealand at any time AS / NZS 3500.0:1995 STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND Australian/New Zealand Standard National Plumbing and Drainage Code Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Part 0: Glossary of terms Term Definition ablution trough See trough absorber See solar water heater—terms absorption pit A pit, trench or well dug into permeable ground, filled with broken stone, bricks or large granular material and usually covered with earth, where liquid may soak away into the ground Also called soakaway absorption test See test access chamber See chamber access cover See cover access fitting See fitting access opening An opening in a building element, fitted with a cover which is removable to allow maintenance of a concealed pipe, fixture or other apparatus access pipe See pipe access point A place where access may be made to a drain for inspection, cleaning or maintenance; and may include an inspection point, rodding point, inspection chamber or access chamber accessible Capable of being reached for the purposes of inspection, maintenance, repair, or replacement, but may first require removal of an access panel, cover, door or similar obstruction adaptor fitting See fitting aeration systems Systems designed to treat liquid waste by the processes of air injection aerator A device to introduce air into the flow of a liquid as part of a treatment process COPYRIGHT AS / NZS 3500.0:1995 Term Definition aerobic A state where molecular oxygen is present aerobic treatment systems Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited See aeration systems against-pitch installation See solar water heater—terms air chamber See chamber air cooling equipment See cooling equipment air eliminator A device which opens to release accumulated air from a hydraulic system and which automatically closes in the presence of a liquid air gap (a) Sanitary plumbing system The unobstructed vertical distance through the free atmosphere between the outlet of a discharge or waste pipe and the overflow level of the receptacle into which it is discharging (b) Water supply system The unobstructed vertical distance through the free atmosphere between the lowest opening of a water service pipe or fixed outlet supplying water to a fixture or receptacle and the highest possible water level of such fixture or receptacle air test See test air valve See valve air venting Allowing air to enter or escape from a confined space to facilitate movement air vessel A vessel which utilizes the compressibility of contained air to promote a more uniform flow of water air/water pressure vessel A vessel in which water is stored under pressure of compressed air The vessel forms part of a pumped water supply system Variations in the amount of water stored are accompanied by variations in the pressure of the air and can be used to control the stopping and starting of the pumps airlift A method of raising liquid by the injection of compressed air airlift pump airlock anaerobic See pump (a) An air space with doors separating a water closet or urinal apartment and an adjacent room (b) Air in a pipe which stops the flow of liquid in a pumping or gravity circuit A state where free oxygen is absent COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited AS / NZS 3500.0:1995 Term Definition anchor blocks Blocks, usually of concrete, placed at intervals and at changes of direction along a pipeline to prevent pipe movement Sometimes referred to as thrust blocks anchorage Means of preventing movement of pipes or fittings subject to unbalanced forces angle of fitting See fitting angle of inclination See solar water heater—terms anode The negative electrode of a galvanic couple which corrodes preferentially to the positive electrode (cathode) appliance An apparatus or piece of equipment designed to perform a normal everyday task aqueduct Any water supply channel vested in, belonging to, or under the control of the responsible authority arrestor An apparatus designed to intercept and retain silt, sand, oil, grease, sludge or other substance that is a prohibited discharge to the sewerage or drainage system atmospheric vacuum breaker See backflow prevention device authority See regulatory authority authorized Applies to materials, products, fixtures, appliances and apparatus which are sanctioned for use in the area of jurisdiction of the authorizing authority autoclave See sterilizer autogenous welded joint See joint automatic cistern See flushing cistern automatic flush tank See tank autopsy table A fixture upon which post-mortem examinations are performed and which has provision for drainage to the sanitary plumbing system auxiliary water heater See water heater average recurrence interval Rainfall intensity for stormwater design purposes back fall See fall back-siphonage Backflow that occurs when the water supply pressure falls below atmospheric pressure COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited AS / NZS 3500.0:1995 Term Definition backfill See fill backflow (a) Flow in a direction contrary to the normal or intended direction of flow; or (b) the unintended flow of water from a potentially polluted source into a potable water supply backflow condition Any arrangement whereby backflow may occur backflow prevention device A device to prevent the reverse flow of water from a potentially polluted source into a potable water supply system atmospheric vacuum breaker A device to prevent backflow caused by back siphonage, which incorporates a ventilation valve, which operates automatically to admit air into the downstream chamber of the valve whenever the pressure in the chamber reduces to or falls below atmospheric pressure double check valve A device to prevent backflow caused by backpressure, and which has two independently operating force loaded non-return valves and incorporates specific test points for in-service testing dual check valve A device to prevent backflow caused by backpressure, which incorporates two independently operating force loaded non-return valves dual check valve with atmospheric port A device to prevent backflow caused by back-siphonage or backpressure, which incorporates a ventilation port and two independently operating force loaded non-return valves which prevent backpressure when operative, and which automatically admits air to the chamber between the non-return valves, when the upstream non-return valve becomes inoperative hose connection vacuum breaker A device fitted to a hose-tap to prevent backflow in a water reticulation system caused by either back-siphonage or backpressure, which operates automatically to admit air into the system under back-siphonage conditions and vents the system to atmosphere under backpressure conditions pressure type vacuum breaker A device to incorporates automatically whenever the reduced pressure zone device A device to prevent backflow caused by either back-siphonage or backpressure in a water reticulation system, which incorporates two independently operating force loaded non-return valves and which automatically drains to waste, whenever the pressure in the system between the upstream and downstream non-return valves reduces to a pressure not less than 14 kPa below the pressure at the inlet to the upstream non-return valve prevent backflow caused by back-siphonage, which a force loaded ventilation valve, which operates to admit air into the downstream chamber of the valve pressure in the chamber reduces to kPa COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited AS / NZS 3500.0:1995 Term Definition backnut A thin threaded nut, which can be dished on one face to retain a seal, used to form a watertight joint on a longscrew or similar component, i.e tapware backpressure The difference between the pressure within any water service and a higher pressure within any vessel or pipework to which it is connected bain marie A device for heating water in which food containers are placed to keep the contents warm ball joint See joint ball valve See valve band clamped sleeve joint See joint bar chair A unit for supporting steel reinforcement while pouring concrete bar sink barrel (of pipe) barrel nipple See sink The longitudinal section of pipe which does not include the jointing portion See nipple barrel union A fitting for connecting together and disconnecting two pipes basement The floor space of a building which is substantially or wholly below the level of the adjoining ground surface basin A fixture for holding water for ablutionary purposes which may be designed for mounting in a corner, mounted on a floor supported pedestal, attached to a wall by means of brackets and screws, or set in a vanity top bath A fixture for containing water, in which the human body may be immersed for ablutionary or treatment purposes eye (wash) A bath consisting of a small bowl with jets of water controlled by a hand or foot-operated valve foot bath A bath fixed at a low level for washing or soaking feet shower bath A bath combined with a shower outlet spa bath A bath with the facility for injecting air and jets of turbulent water into water contained in the bath batter The slope of the sides of an excavation or soil fixture (i.e urinal) COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 69 AS / NZS 3500.0:1995 Term Definition trade waste See waste trafficable areas Areas subject to vehicular traffic transpiration Transfer of water from plants into the atmosphere transpiration bed A shallow excavation, containing agricultural pipes and filled with layers of graded material for disposing of the effluent from a septic tank by means of evaporation and transpiration from plant growth trap Any fitting designed to retain a water seal for the purpose of preventing the passage of gases bottle trap A trap in which the seal is maintained by an internal membrane, the configuration of which will not unduly restrict the flow through the trap boundary trap A trap used to aerially disconnect the house drain from the sewer fixture trap A trap connected directly beneath the outlet of a fixture grease trap See arrestor gully trap A receptacle to receive the discharge of waste water prior to discharging to the drain and to maintain a water seal between the drain and the waste lines integral trap A trap incorporated as part of a manufactured fixture P-trap A trap constructed with the inlet leg vertical and the outlet leg inclined below the horizontal within specified limits P-trap (universal) A P-trap with a swivel joint on the outlet leg to facilitate alignment S-trap A trap in which the outlet leg is parallel to the inlet leg S-trap (universal) An S-trap with a swivel joint on the outlet leg to facilitate alignment tube trap A trap in which the seal is maintained without the use of an internal membrane water trap A fitting designed to prevent foul air escaping from the plumbing system or sewage (foul) water drainage system and entering a building weir of trap The lowest point of the outlet leg of a trap trap seal test See water seal test trap vent See vent COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited AS / NZS 3500.0:1995 70 Term Definition trap water seal The water retained in a trap which acts as a barrier to the passage of air through the trap triple bowl sink See sink trough An open boxlike fixture for containing water ablution trough A fixture for holding water for cleansing purposes which has a number of taps spaced to enable multiple use laundry trough A fixture having one or more receptacles for temporarily retaining liquid during washing operations trough urinal See urinal trunk water main See main tube A length of circular pipe of uniform cross-section tube trap See trap tubular Pipe fittings in the form of a pipe piece, nipple, longscrew, bend, spring or return bend tundish A fitting into which pipework can discharge with an air gap tungsten inert gas (TIG) welding A process of electric welding where an arc is struck between the work piece and a tungsten electrode shielded by an inert gas (commonly argon) A separate filler rod is required type test See test ultra-violet (UV) light Light rays which have a wavelength just shorter than the violet end of the visible light spectrum uncontrolled water heater See water heater union See joint union stop tap See tap unrated system See solar water heater—terms untrapped floor drain See drain unvented solar water heater See solar water heater unvented water heater See water heater upstand An extension of the material at the back or ends of a sanitary plumbing fixture to prevent the ingress of water at the wall junction COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 71 AS / NZS 3500.0:1995 Term Definition upstream vent See vent urinal A sanitary plumbing fixture for the reception and flushing away of urine slab urinal A urinal consisting of a flat impervious slab fixed on a wall, incorporating an integral channel trough urinal A urinal in the form of a trough for use by more than one person at the same time wall-hung urinal A urinal fixed on the wall urinal stall A urinal having a back curved on plan to form a stall for the user It has an integral floor channel When stall urinals are fixed in ranges, division slabs are provided between each stall vacuum conditions Situations where the pressure is lower than atmospheric pressure vacuum pump See pump vacuum relief valve See valve valve A device for controlling the flow of a fluid, having an aperture which can be wholly or partially closed by the movement relative to the seating of a component in the form of a plate or disc, a door or gate, a piston, a plug or a ball or flexing of a diaphragm air admittance valve A valve installed on a sanitary plumbing system which is designed to open during periods of negative pressure and permit air to enter, thus maintaining the water level in the trap seal air valve (a) An automatic valve for the discharge of air from, or the admission of air to, a water main, each containing a buoyant ball which seats itself to close an orifice (b) A manually operated valve used to release air from a water pipe or fitting ball valve A valve having a ball which can be turned to move its port or ports relative to the body seat ports, to control the flow of fluid butterfly valve A valve in which a disc is turned substantially through 90 degrees from the closed to the open position on an axis transverse to that of the valve ports check valve See non-return valve combination relief valve A valve which combines pressure-relief valves COPYRIGHT the features of temperature and AS / NZS 3500.0:1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Term 72 Definition delayed action float valve A float valve in which the action is delayed until the level of the liquid rises or falls by a predetermined amount diaphragm valve A valve in which a flexible diaphragm forms the closure member and in which the diaphragm isolates the fluid controlled by the valve double air valve An air valve having two chambers, one with a small orifice, and one with a large orifice double check valve See mechanical backflow prevention device dual check valve See mechanical backflow prevention device equilibrium float valve A float valve designed so that the hydraulic forces on the closing plunger are in balance expansion control valve A pressure-activated valve which opens in response to an increase in pressure caused by the expansion of water during the normal heating cycle of the water heater, and which is designed for installation on the cold water supply to the water heater float valve A valve for controlling the flow of a liquid into a cistern or other vessel, which is operated by the movement of a float flush valve A manually operated hydraulic device which discharges a predetermined quantity of water to fixtures for flushing purposes Also called a flusherette or flushometer foot valve A non-return valve fitted at the bottom of a pump suction pipe in order to retain the water in the pipe full way valve A valve having the same internal bore as the connecting pipes, which permits unrestricted flow gate valve A valve which affords a straight through flow and in which a sliding gate is moved in its own plane at right angles to the flow globe valve A screwdown valve having a partially spherical body with a horizontal inlet and a horizontal or vertical outlet The valve sealing washer is attached to the valve spindle isolating valve Any valve for the purpose of isolating part of a water system from the remainder jumper valve A component of a screwdown valve or tap which forms the closing member of the valve This refers only to a loose jumper valve which is normally separate from the valve spindle Generally constructed of copper alloy or plastics COPYRIGHT 73 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Term AS / NZS 3500.0:1995 Definition kinetic air valve An air valve of such a design that escaping air does not cause the ball to seal the orifice level control valve A valve for controlling the flow into a tank or vessel The valve operates when the water level rises or falls to predetermined levels It may be actuated directly by a float, or remotely by a float or pressure-sensing equipment which detects changes in water level mechanical mixing valve A mixing valve of the non-thermostatic type, which controls the temperature from the mixed water outlet mixing valve A valve in which separate supplies of hot water and cold water are mixed together, either manually or automatically, to give a desired temperature from the mixed water outlet non-return valve A valve to prevent reverse flow from the downstream section of a pipe to the section of pipe upstream of the valve plug valve A valve consisting of an internal plug which can be turned to move its port or ports relative to the body seat ports to control the flow of fluid pressure limiting valve A valve which limits the outlet pressure to the set pressure, within specified limits only, at inlet pressures above the set pressure pressure ratio valve A valve which automatically reduces outlet water pressure to a specified ratio of its inlet pressure pressure reducing valve A valve which automatically reduces the pressure to below a predetermined value on the downstream side of the valve pressure-relief valve A spring-loaded or weight-loaded valve for automatically controlling the build-up of excessive pressure in pipework or fittings by means of a discharge to atmosphere pressure-sustaining valve A valve which automatically maintains a predetermined pressure on the upstream side of the valve reflux valve A valve which prevents the reversal of flow by means of a flap or other mechanism relief valve A valve which will open to release excess pressure from a system reverse action float valve A float valve, for use in large automatic flushing cisterns, which is open when the float is at top water level and closed when the float is at bottom water level A pet cock on the supply side of the ball valve initiates the operation safety valve A pressure-relief valve fitted on, or close to a boiler or unfired pressure vessel COPYRIGHT AS / NZS 3500.0:1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Term 74 Definition scour valve A valve fitted to a scour pipe screwdown valve A valve in which the disc is lifted from and lowered onto the body seat by a stem whose axis is perpendicular to the face of the body seat service valve A valve for the isolation of a water heater or appliance It is fitted between the inlet header pipe and the appliance inlet and between the outlet of the water heater and the outlet header pipe single air valve An air valve with a single chamber having either a small orifice or a large orifice sludge valve A valve used for drawing off sludge from the bottom of a cistern or tank sluice valve A solid sliding gate valve, usually key or wheel operated, used for waterworks purposes solenoid valve A valve adapted for electrical remote control and actuated by a solenoid and plunger stop valve A valve which can be operated to stop the flow in a pipeline temperature-relief valve A temperature-actuated valve which automatically discharges fluid at a specified set temperature It is fitted to a water heater to prevent the temperature in the container exceeding a predetermined temperature, in the event that energy input controls fail to function temperature-pressure-relief (TPR) valve A spring loaded automatic valve limiting the pressure and temperature by means of discharge, and designed for installation on the hot side of a storage water heater tempering valve A mixing valve which is temperature actuated and is used to temper a hot water supply with cold water to provide hot water at a lower temperature, e.g 50°C, at one or more outlet fixtures thermostatic mixing valve A mixing valve in which the temperature from the mixed water outlet is automatically controlled by a thermostatic element/sensor to a preselected temperature vacuum relief valve A pressure actuated valve which automatically opens to relieve vacuum conditions vented double check valve See mechanical backflow prevention device valve cover See cover valve key See key vandal proof tap See lockshield tap COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 75 AS / NZS 3500.0:1995 Term Definition velocity head See head vent A pipe provided to limit the pressure fluctuations within the discharge pipe system or to encourage the passage of gases branch vent A graded vent at any one floor level, interconnecting two or more individual trap vents or group vents breather vent A DN 50 vent from the topmost junction of a sealed gully riser to atmosphere extending a minimum of 300 mm above the lowest fixture discharging to the sealed gully common vent A vent installed at any floor level It is provided for venting the traps of not more that two (2) fixtures individually connected and normally is a vertical extension of a graded pipe or branch cross vent A vent interconnecting a stack and its relief vent downstream vent A drainage vent located on, or connected to, a drain discharging to a boundary trap educt vent Allows air to exit from the drain ground vent Allows air to enter the drain Also called low-level vent or induct vent group vent A vent connected to a branch to which unvented fixture discharge pipes are connected header vent A vent interconnecting the tops of two or more relief vents or stack vents high-level vent A vent which terminates above roof level induct vent See ground vent low-level vent See ground vent relief vent A vent installed in a stack below the lowest fixture stack vent The extension of a discharge stack above the highest connected discharge pipe terminal vent See educt vent trap vent A vent pipe venting an individual trap to the open air, or to a main or branch vent pipe for the prevention of loss of waterseal in the trap upstream vent The vent installed adjacent to the upper end of a drain COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited AS / NZS 3500.0:1995 76 Term Definition vent cowl A sanitary fitting for installation on the outlet end of a vent pipe to prevent the ingress of birds, rodents and foreign matter vent pipe See pipe vented pipe See pipe vented double check valve See mechanical backflow prevention device vented solar water heater See solar water heater vented water heater See water heater venting (a) Removal of foul gases from a sanitary installation atmosphere by means of a vent pipe; or (b) Allowing air to enter or escape from a soil or waste pipe for the purpose of preventing the breaking of the water seal in the trap to vertical A length of pipework which is vertical or makes an angle of less than 45 degrees to the vertical vitreous china A strong, high-grade ceramic material made from a mixture of clays and other materials vitreous enamel Glazed coating fused on the metal surfaces for protection or decoration vitrified clay Ceramic ware used for sewer pipes and fittings, consisting of a vitrified clay body without a surface glaze wall-hung water closet See water closet pan wall thickness The thickness of the wall of a pipe, fitting or fixture, not including any lining or coating wall-hung urinal See urinal wall-hung water closet pan See water closet pan washdown water closet pan See water closet pan waste The discharge from a waste fixture or appliance floor waste A grated inlet within a graded floor intended to drain the floor freestanding waste A waste pipe (not connected to a fixture), to receive the discharge by a flexible hose connected from a water using appliance such as a dishwasher or washing machine COPYRIGHT 77 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Term AS / NZS 3500.0:1995 Definition pop-up waste A waste outlet fitted with a captive plug which is seated in, or lifted clear of, the waste outlet by means of a manually operated lever safe waste A pipe connected to a safe tray to convey any water collected, to a location where it will not cause damage or nuisance standing waste A combined waste plug and overflow for a sink or wash-trough, consisting of a tube, the bottom end of which is tapered for sealing off the waste outlet around its periphery The top end of the tube terminates a short distance below spill-over level of the fixture, thus forming an overflow leading to the waste outlet trade waste Waterborne waste from any business, trade or manufacturing premises other than domestic sewage, stormwater or unpolluted water waste arrestor See arrestor waste fixture See fixture waste outlet See outlet waste pipe See pipe waste plug See plug waste stack See stack waste water The spent or used water of a community or industry which contains dissolved and suspended matter water charged ground A ground subject to a high water table condition water closet (WC) The compartment in which a WC pan is installed water closet (WC) pan A receptacle in the form of a bowl incorporating a water seal used in conjunction with a flushing device for the disposal of human wastes chemical water closet pan A portable or fixed receptacle for human wastes in which chemicals are added, generally with disinfectant and deodorant properties close coupled water closet pan A WC pan directly coupled to the flushing cistern corbel water closet pan A WC pan projecting from a wall in order to support the fixture clear of the floor pedestal water closet pan A floor-mounted WC pan COPYRIGHT AS / NZS 3500.0:1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Term 78 Definition siphonic water closet pan A WC pan in which the contents are removed by siphonic action induced by the flushing water wall-hung water closet pan A sanitary fixture or cantilevered from a wall washdown water closet pan A WC pan from which the contents can be removed by a flush of water discharged into the pan from the flushing rim water closet (WC) cistern See cistern water closet seat A seat of wood, plastics or other impervious material (with or without a hinged cover) made to fit the top of a WC pan water closet suite A sanitary fixture consisting of a WC pan, seat, cistern and any necessary flushpipe water cooling equipment See cooling equipment water hammer Pressure surges in a closed pipe system as the result of a sudden change in velocity of the liquid, e.g by a valve closure or pump start or stoppage water-hammer arrestor A device to lessen or eliminate shock waves in a water pipe, generated by water hammer water heater An appliance, usually self-contained, designed to provide hot water within a building by circulating it through a pipe network, usually lagged or insulated by some other material auxiliary water heater A secondary water heating device having a coil or container fitted to cooking or heating equipment or a flue assembly, fuelled by an uncontrolled heat source and used to supplement a primary water heater or system (Refers to uncontrolled thermal energy) boiler A vented water heater, designed to provide boiling or near boiling water central heating water heater A water heating system designed to heat the environment within a building by circulating heated water through a pipe network or other device cistern-fed water heater A vented water heater supplied with cold water from a static feed tank in which the level of the water is automatically maintained controlled pressure water heater An unvented water heater, designed for direct connection to the water supply system but having a pressure-temperature relief valve setting of less than 1.4 MPa A pressure limiting valve or similar device is normally required to be installed on the cold water supply inlet COPYRIGHT 79 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Term AS / NZS 3500.0:1995 Definition displacement water heater A water heater in which cold water is fed into the container at or near the bottom, displacing but not mixing with the hot water as it is drawn off at or near the top falling level water heater Non-displacement water heater with the water surface being open to the atmosphere, in which hot water is drawn off at or near the bottom, the level of the water falling as the hot water is drawn off free outlet water heater A vented water heater containing a permanently open outlet, from which heated water is discharged by displacement from a storage container, the flow of water being controlled by means of a valve in the inlet water feed pipe heat exchange water heater A water heater in which potable water is heated by a heat transfer system that maintains a physical separation between a primary heat transfer fluid (which may be distilled, demineralized or potable water, specific refrigerants or chemicals) and the potable water household water heater A water heater, including those designed for use in conjunction with the various sources of supplementary heating, which complies with AS 1056, Parts 1, and 3, and the Australian Gas Association’s Class A Category as defined in Codes 102 and 109, or with NZS 4602 or NZS 4606 and the NZBC or NZ Gas Regulations 1993, as reviewed or amended and where under normal working conditions the hot water temperature does not exceed 85° and under emergency conditions does not exceed 99°C (See also mains pressure) instantaneous water heater A flowswitch-controlled unvented water heater in which the heat energy is applied only while water flows to an outlet and which does not incorporate any significant storage volume low pressure water heater A water heater designed to work under a pressure not exceeding 12 m head and not having a free water surface, i.e not a zero pressure water heater mains pressure water heater An unvented water heater designed for direct connection to the water supply system and having a pressure-temperature-relief valve setting not exceeding 1.4 MPa pre-heater water heater A water heater not containing a means of supplementary heating and installed to preheat the cold water supply prior to its entry into any other type of household water heater (i.e waste heat recovery from air conditioning condensers) reduced pressure water heater A displacement water heater designed to operate at a pressure below the normal water main inlet pressure and to be installed with a pressure control device fitted on the inlet COPYRIGHT AS / NZS 3500.0:1995 Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited Term 80 Definition side-fed water heater A displacement water heater with a free water surface, in which the cold water is supplied from an integral feed tank cistern attached to the side of the heater and the hot water is drawn off at an outlet located below the free water surface storage water heater A water heater which incorporates a thermally insulated container in which the water is heated and stored for subsequent use supplementary water heater An additional appliance or device supplying water heated by a controlled heat source and used to supplement a primary water heater or system (Refers to controlled thermal energy) thermostat controlled water heater A water heater in which the heat energy is supplied in response to a thermostat temperature indication, for water flow on the outlet side of the heater uncontrolled energy water heater A water heater in which the heat energy is provided by an uncontrolled heat source e.g a solids combustion heater This does not include a solar water heater unvented water heater A water heater in which no provision is made for a vent permanently open to atmosphere valve vented storage heater (unvented storage water heater) A storage water heater in which the required venting to the atmosphere is controlled by a valve vented water heater A water heater in which provision is made for a vent permanently open to atmosphere water heater lining A water-resistant material applied to the internal surface of a water heater container and subject to direct contact with the water within the container water main See main water pump See pump water seal See trap water seal water seal test See test water service That part of the cold water supply pipework from the water main up to and including the outlet valves at fixtures and appliances water service joint off-take The pipes and fittings used or intended to be used in connection with the supply of water from a joint water service to serve two or more dwelling units on the same property water service pipe See pipe water storage tank See tank COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 81 AS / NZS 3500.0:1995 Term Definition water supply systems (alternative) A system where there is a direct connection between water coming from the alternative water source and the authority’s supply grey water reuse systems A system where grey water (waste water but not soil or black water), is collected, not treated and reused for acceptable purposes reticulated disinfected reclaimed water systems A system where soiled water is collected, treated to acceptable minimum standards of controlled disinfection and then reticulated to properties water table The normal level of groundwater water test See test watercourse A depression where accumulated natural surface water flows WC pan See water closet pan weep flange See flange weir of trap See trap welded joint See joint wet well A below-ground chamber for the collection of sewage or waste water and fitted with a pumping device to raise the contents to a suitable disposal point with-pitch installation See solar water heater—terms work of sanitary drainage The construction, alteration, extension, disconnection, removal, maintenance, repair, renewal, ventilation, flushing or cleansing of any sanitary drain, connecting or intended to connect, directly or indirectly with any sewer of an authority work of draining Work carried out in connection with the installation, alteration, extension, disconnection, removal, renewal, repair and maintenance of pipes, tanks, appliances, fixtures and fittings generally external to a building designed or intended to: (a) receive the discharge from a sanitary plumbing system and convey the discharge to a sewer or drain, or to a septic tank, or to a treatment facility and thence to a drain; or (b) collect, convey or dispose of stormwater to a stormwater disposal system COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited AS / NZS 3500.0:1995 82 Term Definition work of gasfitting Work carried out in connection with fuel gases and includes the installation, commissioning, alteration, extension, disconnection, removal, repair and maintenance of pipes, fittings, appliances, apparatus and associated ventilation lines and equipment designed to convey, mix, store, measure, protect, treat, modify, regulate the flow of, or utilise fuel gases, such as manufactured gas, liquefied petroleum gas, tempered liquefied petroleum gas, bio-gas, methane, simulated natural gas and natural gas but does not include work on gas propulsion systems associated with automotive and marine craft work of liquefied petroleum gasfitting Gasfitting in which the fuel gas conveyed and utilised is liquefied petroleum gas work of mechanical services plumbing Work carried out in connection with heating, cooling or ventilation of buildings and includes the installation, commissioning, alteration, extension, disconnection, removal, renewal, repair and maintenance of ducts, pipes, flues, valves, regulators, registers, tanks, heating or cooling lines or surfaces, boilers, burners or coils or ancillary equipment used in heating, cooling and ventilation systems, and includes the connection of water to those systems, but does not include gasfitting or water plumbing work of roof plumbing Work carried out in connection with the installation, alteration, renewal, repair and maintenance of roof coverings (other than nonmetallic tiles or slates, or malthoid, bitumenous or similar membrane sheeting) and roof water systems including gutters, flashings, valleys, ridging, weathering, rainwater piping and downpipes designed to collect or convey water discharged from roofs work of sanitary plumbing Work carried out in connection with the collection, conveyance or disposal of sewage, liquid trade wastes and other permitted discharges and includes the installation, alteration, extension, disconnection, removal, renewal, repair and maintenance of pipes, tanks, fittings, appliances and fixtures designed to receive, convey, store, treat, modify, or regulate the flow of sewage, liquid trade wastes or other permitted discharges and the ventilation of those pipes, tanks, fittings, fixtures and appliances work of sewerage The construction, alteration, extension, disconnection, removal, maintenance, repair, renewal, ventilation, flushing or cleansing of any sewerage service pipes, or fittings or fixtures connecting or intended to connect directly or indirectly with any sewer of an authority and includes work of sanitary plumbing and work of sanitary drainage work of stormwater drainage The construction, alteration, extension, disconnection, removal, maintenance, repair, renewal or cleansing of any stormwater drain, communicating or intended to communicate directly or indirectly, with any stormwater channel of an authority COPYRIGHT Licensed to LUU MINH LUAN on 25 Feb 2002 Single user licence only Storage, distribution or use on network prohibited 83 AS / NZS 3500.0:1995 Term Definition work of water plumbing Work carried out in connection with the supply or conveyance of water and includes the installation, alteration, extension, disconnection, removal, renewal, repair and maintenance of pipes, tanks, fixtures, appliances and fittings designed to convey, store protect, treat, mix, measure, modify or regulate the flow of water, including hot water work of water supply The construction, alteration, extension, disconnection, removal, maintenance, repair, renewal or clearing of any pipes or fittings of any water service connecting or intended to connect, directly or indirectly with any water main of an authority working head See head working pressure The maximum internal pressure that can be sustained by a pipeline component for its estimated useful life, under the anticipated working conditions working water level The level to which the water in a storage tank or cistern is filled to give normal discharge capacity wrapping Protective material closely wrapped around a pipe to protect the pipe and coating against corrosion wrenching flats Machined or cast flats on a fitting to allow use of a suitable wrench wrought A general term for products obtained by hot or cold plastic deformation processes such as extruding, hot rolling, cold rolling or drawing, either exclusively or in combination Y junction See junction COPYRIGHT ... prohibited AS/ NZS 3500.0:1995 Australian/New Zealand Standard National Plumbing and Drainage Code Part 0: Glossary of terms AS/ NZS 3500.0:1995 This Joint Australian/New Zealand Standard was prepared... by Standards Australia or Standards New Zealand at any time 3 AS / NZS 3500.0:1995 STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND Australian/New Zealand Standard National Plumbing and Drainage Code. .. Australia/Standards New Zealand Committee WS/14 on the National Plumbing and Drainage Code, to supersede AS 3500.0 — 1990, National Plumbing and Drainage Code, Part 0: Glossary of terms Licensed to LUU MINH