248 CMR, § 10.03
For purposes of 248 CMR 10.00, the terms defined in 248 CMR 3.00: General Provisions Governing the Conduct of Plumbing and Gas Fitting Work Performed in the Commonwealth have the meanings as defined in 248 CMR 10.03.
In addition, for the purposes of 248 CMR 10.00, the following terms shall have the meanings. No attempt is made to define ordinary words which are used in accordance with their established dictionary meaning except where it is necessary to define their meaning as used in 248 CMR 10.00 to avoid misunderstanding.
ABS. Acrylonitrile-Butadiene-Styrene.
Accessible. Having access thereto that may require the removal of an access panel, door, or similar obstruction.
Accessible (Readily). Direct access without the necessity of removing or moving any panel, door, lock or similar obstruction.
Air-break (Drainage System). A piping arrangement wherein a drain from a fixture, appliance, or device discharge indirectly into a fixture, receptacle, or interceptor at a point below the flood level rim of the receptacle.
Air Gap (Drainage System). The unobstructed vertical distance through the free atmosphere between the outlet of a waste pipe and the flood level rim of the receptacle into which the waste discharges. An air gap shall be at least twice the effective diameter of the drain served.
Air Gap (Water Distribution System). The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, plumbing fixture, or other device and the flood level rim of the related receptacle. An air gap shall be at least twice the effective opening of the potable water outlet.
Alkalinity. The measure of its capacity to neutralize acids. The quality or state of being alkaline. Containing more alkali than normal. Having a pH factor of more than seven. The opposite of acidity.
Anti-siphon Vacuum Breaker - Non-pressure Type (Back-siphonage Preventer). A device or means to prevent back-siphonage. Not to be used under continuous pressure.
Anti-siphon Vacuum Breaker - Pressure Type (Back-siphonage Preventer). A device or means to prevent back-siphonage. Designed to be used under continuous pressure.
Anti-siphon Valve. A diaphragm type spring loaded device that prevents unwanted siphoning or over pumping of a chemical into a potable supply of water. Such device is constructed to sit tight on increasing vacuum, and its positive pressure opening point shall not be less than five PSIG.
Area Drain. A receptacle designed to collect surface or storm water from an open area.
Backflow. The flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable supply of water from any source or sources other than its intended source. Back-siphonage and back pressure are examples of backflows.
Backflow Connection. Any arrangement whereby backflow can occur.
Backflow Preventor. A device or means to prevent backflow.
Backflow Preventor (Reduced Pressure Zone Type). An assembly of differential valves and check valves including an automatically opened spillage port to the atmosphere.
Back-pressure. Pressure created by mechanical means or other means, causing water, liquids or other substances to flow, or move, in a reverse or opposite direction than intended.
Back-pressure Valve. A spring loaded one way check valve to prevent over pumping or unwanted siphoning of a chemical into a potable supply of water.
Back-siphonage. The flowing back of used, contaminated, or polluted water from a plumbing fixture, vessel or other sources into a water supply pipe due to a negative pressure in such pipe.
Barometric Loop. A vertical loop of pipe, rising to a height sufficient to prevent back-siphonage from occurring in the potable water supply pipe. (Approximately 35 feet, depending on the weight of the atmosphere.)
Bathroom (Residential). A room equipped with a bathtub or shower stall, toilet and a lavatory basin or any combination thereof.
Bathroom (Half-bath). A room equipped with a toilet and a lavatory basin.
Battery of Fixtures. Any group of two or more similar fixtures, that are adjacent, which discharge into a common horizontal waste or soil branch. See 10.03: Example 1.
10.03: Example 1 - Battery of Fixtures
Battery Waste & Vent System. SeeCombination Waste &Vent System.
Black Water. Wastewater containing fecal matter and other human waste that is flushed or discharged from toilets or urinals.
Boiler Blow-off. An outlet on a boiler to permit emptying or discharge of sediment.
Boiler Blow-off Tank. A vessel designed to receive the discharge from a boiler blow-off outlet, to cool the discharge to a temperature of 150° F or less and permits the discharge to flow safely to the drainage system.
Branch. Any part of a piping system other than a main, riser, or stack.
Branch Interval. A distance along a soil or waste stack corresponding in general to a story height, but not less than eight feet in vertical height, and wherein the horizontal branches from one floor or story of a building would be connected to the stack. See 10.03: Example 2.
10.03: Example 2 - Branch Intervals
Branch Vent. A vent connecting one or more individual vents with a vent stack or stack vent.
Building. A structure used for the housing, shelter, enclosure, or support of persons, animals or property.
Building Drain. The lowest piping in a drainage system receiving discharge in fixture units from soil, waste and other drainage piping conveying that waste to a building sewer measured ten feet in developed length from the inside face of the foundation wall. The ten-foot section defined as the Building Drain shall be minimum four inch and sized in accordance with 248 CMR 10.15(6)(b). See 10.03: Example 3.
10.03: Example 3 - Building Drain
Building Drain - Sanitary. A building drain which conveys the discharge of plumbing fixtures.
Building Drain - Storm. A building drain which conveys storm water waste or other clear water drainage.
Building Sewer. The pipe that begins at the end of the building drain and extends to a public sewer, septic tank, or other place of sewage disposal. See 10.03: Example 4.
10.03: Example 4 - Building Sewer
Building Sewer - Combined. A building sewer that conveys both sewage and storm water or other drainage.
Building Sewer - Sanitary. A building sewer that conveys the discharge of plumbing fixtures.
Building Sewer - Storm. A building sewer that conveys storm water waste or other clear water drainage except that it does not convey sewage.
Building Subdrain. The portion of a drainage system that cannot drain its discharge into a building sewer via the force of gravity.
Building Subdrain - Sanitary. The portion of a drainage system that cannot drain its sewage discharge into a building sewer via the force of gravity.
Building Subdrain - Storm. The portion of a drainage system that cannot drain its storm water waste, clear water discharge or other subsurface clear water discharge excluding sewage, into a building storm sewer via the force of gravity.
Circuit Vent. A branch vent that serves two or more floor-outlet fixtures that are battery wasted. Said vent extends from the top of the horizontal soil and/or waste branch in front of the last fixture waste and connects to a vent stack adjacent to the upstream end of the horizontal branch. A circuit vent begins where a drain from the fixture connects to the battery waste horizontally and extends to a point where it runs vertically to the venting system providing free movement of air above the flow line of the horizontal drain.
Clear Water Waste. Wastewater discharge from air conditioning and refrigeration equipment, condensate from steam equipment, steam and water boiler blowdowns, sprinkler system discharge and other similar types of waste containing only clear water.
Combination Fixture. A fixture that combines multiple compartments into one unit.
Combination Waste and Vent System. A specially designed system of waste piping embodying the horizontal wet venting of one or more plumbing fixtures or floor drains by means of a common waste and vent pipe. In such a system, the piping is adequately sized to provide free movement of air above the flow line of the drain. The complete system shall be compliant with 248 CMR 10.16(1)(a).
Common Vent. A vertical vent that serves two fixtures and connects in compliance with 248 CMR 10.16: Table 1.
Conductor. A pipe that is inside a building and conveys storm water from the roof to a storm drain or combined building sewer/storm sewer. See 10.03: Example 5.
10.03: Example 5 - Roof Drain Conductor
Core Facilities. A rest room consisting of at least one toilet and one lavatory which may be utilized by more than one business, classification, or category within that building or structure.
CPVC. Chlorinated Polyvinyl-Chloride.
Continuous Vent. A vertical vent that is a continuation of the vertical drain to which it connects.
Critical Level. In the potable water supply piping, the minimum elevation that a backflow prevention device or anti-siphon vacuum breaker is installed, above the flood level rim of the fixture or receptacle it is to serve.
Cross Connection. Any actual or potential physical connection or arrangement between a pipe containing potable water from a public water system and any non-potable water supply, piping arrangement, or equipment, including, but not limited to waste pipe, soil pipe, sewer drain or other unapproved sources. (SeeBack-flow and Back-siphonage.)
Dead End. A branch on a potable water system which does not contain an accessible isolation valve located within five feet of the main capped for possible future use.
Decontamination. The reduction or removal of microbial or hazardous chemical contamination from surfaces, liquids or spaces.
Dedicated Systems. Specialized plumbing systems which are located within a property line, but not necessarily within a Building, that are utilized for storing, treating, removing, or recycling water and waste products. Examples of dedicated systems include, but are not limited to:
Developed Length. The length of a pipeline as measured along the center line of the pipe or fittings.
Double Offset. Two changes of direction that are or have been installed in succession or series in a continuous pipe.
Domestic Sewage. The waterborne wastes derived from ordinary living processes.
Drain. A horizontal pipe that carries wastewater or waterborne waste in a drainage system.
Drainage System. Includes all the piping contained within a public or private premise that conveys sewage, rainwater, or other liquid wastes to an appropriate point of disposal. It does not include the mains of a public sewer system or private or public sewage treatment or disposal plant.
Drainage System - Building Gravity. A drainage system that drains via the force of gravity into a building sewer.
Drinking Fountain. For the purposes of 248 CMR 10.00, Drinking Fountain shall be either Drinking Water Station - With Drain or Drinking Water Station - Without Drain.
Drinking Water Station - With Drain. A device equipped with a nozzle that when activated provides a stream of drinking water for either direct consumption or to allow filling of bottles. Said device is connected to the water distribution system, may chill, and/or filter the water, and is connected to the sanitary drainage system.
Drinking Water Station - Without Drain. A device equipped with a nozzle that when activated provides a stream of drinking water for either direct consumption or to allow filling of bottles. Said device is connected to the water distribution system, may chill, and/or filter the water, and is not connected to the sanitary drainage system, though rough plumbing has been added to facilitate a future connection.
Durham System. Soil or waste systems where all piping is threaded pipe that uses recessed drainage fittings to correspond to the types of piping.
Dwelling - Single. A room or group of rooms, forming a single unit that is an independent building enclosed within its own exterior walls, roof, and foundation, with facilities which are used, or intended to be used, for sleeping, living, cooking, and eating; and where both the sewer connection and water supply are within the building's own premise and is separate from and completely independent of any other dwelling.
Dwelling - Multiple. Three or more single dwellings that are not independent buildings, sharing exterior walls, roof, and foundation and where a common sewer connection and water supply are within the premise.
Dwelling - Two Family. Two single dwellings that are not independent buildings, that share a common exterior wall, a roof, and a foundation and a where a common water supply and sewer connection are contained within its own premises.
DWV. Drain, Waste and Vent.
Effective Opening. The minimum cross-sectional area at the point of water supply discharge, measured or expressed in terms of:
Fixture (Plumbing Fixture). Installed receptacles, devices or appliances that are either supplied with water and/or receive and/or discharge liquids, or liquid-borne wastes, or both, with or without discharge into the drainage system with which they may be directly or indirectly connect.
Fixture Branch. A pipe connecting several fixtures.
Fixture Drain. A drain connected to the trap of one fixture.
Fixture Connector. The flexible connector made of copper, copper alloy or stainless steel used to connect the fixture shut-off valve to the individual fixture or appliance.
Fixture Unit. One cubic foot of water drained in a 11/4 inch pipe over a period of one minute. One cubic foot of water is equal to 7.5 gallons.
Flood Level Rim. The edge of a receptacle from which water overflows.
Flooded. When the liquid in a fixture or receptacle rises to the flood level rim.
Flow Pressure (Residual Pressure). The pressure in a water supply pipe as measured at the faucet or water outlet when the faucet or water outlet is wide open and flowing.
Flushometer Valve. A device used for flushing purposes that discharges a predetermined quantity of water into fixtures and where the device is closed by direct water pressure.
Grade. The fall (slope) of a line of pipe with reference to a horizontal plane. In drainage it is usually expressed as the fall in a fraction of an inch per foot length of pipe.
Graywater. Used water out-flowing from a clothes-washer, shower, bathtub, or bathroom sink and reused on the same site.
GPM. Gallons Per Minute.
Grease Interceptor (Gravity). A large interceptor, (usually installed outside underground) because it requires an extended time for grease separation (30 minutes or more). The separation is simply due to the specific gravity difference between FOG (fats, oils, and grease) and water. See 10.03: Example 6.
10.03: Example 6 - Gravity Type Grease Interceptor
Grease Interceptor (Hydro-mechanical). A smaller interceptor, (normally installed inside a building) which is compact in size because grease separation occurs continuously due to several simultaneous actions; a hydraulic flow action, air entrainment and the difference in specific gravity between water and FOG (fats, oils and grease).
Hangers. (See Supports).
Horizontal Branch Drain. A drain branch pipe that extends laterally from a soil or waste stack or a building drain, that may or may not have vertical sections or branches, that receives the discharge from one or more fixture drains and that conducts the discharge to the soil or waste stack or to the building drain.
Horizontal Pipe. Any pipe or fitting that makes an angle of less than 45° in reference to a horizontal plane. See 10.03: Example 7.
10.03: Example 7 - Horizontal Pipe
Hot Water. Water at a temperature of at least 120°F.
Individual Sewage Disposal System. A system for disposal or treatment of domestic sewage by means of a septic tank or sewage treatment plant wherein the system is designed for use apart from a public sewer and serves a single establishment or building where a public sewer is not available.
Indirect Waste Pipe. A waste pipe that does not connect directly with a drainage system, but discharges into a drainage system through an air break or air gap into a properly wasted and vented trap, fixture, receptacle or interceptor.
Individual Vent. A pipe installed to vent a fixture drain. It connects with the vent system above the fixture served or terminates at a point above the roof level.
Individual Water Supply. A water supply, other than a public water supply, that serves one or more buildings, dwellings or structures.
Industrial Waste Water. Water that has been contaminated with by-products of industrial manufacturing processes.
Industrial Wastes. Liquid wastes that result from the processes employed in industrial and commercial establishments.
Insanitary. Contrary to sanitary principles; injurious to health.
Interceptor. A device designed and installed to separate and retain for removal, by automatic or manual (passive) means deleterious, hazardous, or undesirable matter from normal wastes and permits normal sewage or liquid wastes to discharge into the drainage system by gravity.
Installed. An altered, changed, or new installation.
Invert. The lowest point inside a pipe upon which water can flow. See 10.03: Example 8.
10.03: Example 8 - Invert of a Pipe
Irrigation System. A system of water distribution piping used to wet or moisten the landscape.
Leaching Well or Pit. A pit or receptacle having porous walls that permits the contents to seep into the ground.
Leader. An exterior drainage pipe for conveying storm water from roof or gutter drains and discharges to a storm water waste system. See248 CMR 10.03: Example 9. See248 CMR 10.03: Plumbing for Jurisdiction.
10.03: Example 9 - Storm Water Leader
Liquid Waste. Discharge from any fixture, appliance, area or appurtenance that does not contain human or animal waste matter suspended in a solution.
Licensee. The holder of a current journeyman or master plumbing license issued by the Board.
Load Factor. The percentage of the total connected fixture unit flow which is likely to occur at any point in the drainage system. It varies with the type of occupancy, the total flow unit above this point being considered, and with the probability factor of simultaneous use.
Loop Vent. A branch vent that serves two or more floor-outlet fixtures that are battery wasted. The loop vent extends from the top of the horizontal soil and/or waste branch in front of the last fixture waste and connects to a vent stack or stack vent that is adjacent to the down-stream end of the horizontal branch as required in 248 CMR 10.16. A loop vent begins where a drain from the fixture connects to the battery waste horizontally and extends to a point where it runs vertically to the venting system providing free movement of air above the flow line of the horizontal drain.
Main. The principal pipe artery to which branches may be connected.
Massachusetts Professional Engineer. A person who is licensed or otherwise authorized to practice in the engineering profession as defined by the statutory and regulatory requirements of the Commonwealth.
Materials. All piping, tubing and fittings, drains and receptacles, interceptors and protectors, hangers and supports, covers and coverings, appliances and other devices and appurtenances used, or referred to, in the definitions of Plumbing, Plumbing Fixtures and Plumbing Systems.
Mezzanine. An intermediate floor (or floors) in a building which is open to the flow below projecting in the form of a balcony and is less than 33% of the area of the floor over which it is located. For the purposes of 248 CMR 10.00, a mezzanine shall not be considered a floor level where fixtures are required.
Non-potable Water. Water that does not meet the standards of potable water. Its bacteriological and chemical quality does not conform to the pertinent requirements of 310 CMR 22.00: Drinking Water.
Nuisance. Public nuisance as known in common law or in equity jurisprudence; what is dangerous to human life or detrimental to health; what building, structure or premise is not sufficiently ventilated, sewered, drained, cleaned, or lighted, with reference to its intended or actual use; or what renders the air or human food or drink or water supply unwholesome.
Offset. A combination of elbows or bends which brings a pipe out of line with one section of piping but into a line parallel with another section of piping.
pH. The negative logarithm of the hydrogen-ion concentration used in expressing both acidity and alkalinity on a scale whose values run from zero to 14, with a lower value of less than seven indicating increasing acidity and values greater than seven indicating increasing alkalinity. A value of seven would indicate a neutral pH condition.
Person. A natural person, his heirs, executors, administrators or assigns; a firm, partnership, corporation, institution, association or group, or their successors or assigns, or a city, town, county, or other governmental unit, owning or renting, leasing, or controlling property, or carrying on an activity regulated by M.G.L. c. 142 or 248 CMR.
PEX. Cross-linked Polyethylene.
Plumbing. Plumbing includes the work and/or practice, materials and fixtures used in the installation, removal, maintenance, extension and alteration of a plumbing system; of all piping, fixtures, fixed appliances and appurtenances in connection with any of the following: sanitary drainage or storm drainage facilities, hazardous wastes, the venting system and the public or private water-supply systems, within or adjacent to any building, structure, or conveyance; to their connection with any point of public disposal or other acceptable terminal within the property line. Plumbing shall not include the following:
Plumbing System. The water supply and distribution pipes; plumbing fixtures and traps; soil, waste, and vent pipes; building sanitary and storm drains including the respective connections, devices, and appurtenances of the drains that are connected a point of public disposal or other appropriate terminal within the property line.
Potable Water. Water that does not contain impurities in amounts sufficient to cause disease or harmful physiological effects. Its bacteriological and chemical quality shall conform to the pertinent requirements of 310 CMR 22.00: Drinking Water.
Private or Private Use. In the classification of plumbing fixtures, private shall apply to fixtures in residences, apartments, condominiums, dormitories, private office bathrooms and to private guest rooms in hotels and motels.
Private Sewer. A sewer, serving two or more buildings, privately owned, and not directly controlled by a public authority.
PSIG. Pounds Per Square Inch Gauge.
Public or Public Use. In the classification of plumbing fixtures, public shall apply to every fixture not defined under Private or Private Use.
Public Sewer. A common sewer directly controlled by public authority.
Public Water Main. A water supply pipe for public use controlled by public authority.
Public Water System. A system for the provision to the public of water for human consumption, through pipes or other constructed conveyances if such system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days of the year. Public Water System includes any collection, treatment, storage, and distribution facilities under control of the operator of such a system and used primarily in connection with such system, and any collection or pretreatment storage facilities not under such control which are used primarily in connection with such system.
Purification Waste. A by-product of waste material generated by or from the fermentation process to produce a pure substance.
Purified Water. Water produced by distillation, deionization, reverse osmosis, or other methods so that it meets the requirements of purified water in the most recent edition of the United States Pharmacopoeia.
PVC. Polyvinyl-Chloride.
Receptor. A properly trapped and vented fixture or device that receives the discharge from indirect waste pipes.
Recombinant Deoxyribonucleic Acid DNA Molecules. Viable organisms containing molecules made outside living cells by joining natural or synthetic DNA segments to DNA molecules that can replicate in a living cell, or DNA molecules that can result from the replication of those described above. Such use shall be in accordance with the NIH Guidelines for Research Involving Recombinant DNA Molecules, Federal Register Vol. 49, No. 227, November 23, 1984, P.462266.
Relief Vent. A vent that is designed to permit additional circulation of air between drainage and vent systems.
Return Offset. A double offset installed so that it returns the pipe to its original alignment.
Reverse Osmosis. A water treatment process that removes undesirable materials from water by using pressure to force the water molecules through a semi-permeable membrane. This process is referred to as "reverse" osmosis. Pressure forces the water to flow in the reverse direction (from the concentrated solution to the dilute solution) to the flow direction (from the dilute to the concentrated) in the process of natural osmosis. Reverse osmosis removes ionized salts, colloids, and organic molecules down to a molecular weight of 100. This process is sometimes referred to as hyperfiltration.
Reverse Osmosis - (Water Treatment Unit). A device installed within a potable drinking water system that uses reverse osmosis as the primary technology for processing potable tap water into high quality drinking water. The reverse osmosis drinking water device is designed to separate water from undesirable dissolved and undissolved substances such as particulate matter, salts, metals, organic matter, and microorganisms.
Rim. An unobstructed open edge of a fixture.
Riser. A water supply pipe which extends vertically one full story or more to convey water to branches or to a group of fixtures.
Roof Drain. A drain receptor installed to receive water that collects on the surface of a roof and conveys the discharge water into a leader or a conductor.
Roughing-in. The installation of all parts of the plumbing system that can be completed prior to the installation of fixtures. This includes drainage piping, water supply piping, vent piping, the necessary fixture supports, and any fixtures that are built into the building.
Sand Trap. SeeInterceptor.
Sanitary Sewer. A pipe that carries sewage but does not carry storm, surface, clear water or ground water.
Seepage Well or Pit. A covered pit with open jointed lining. The septic tank effluent the pit receives may seep or leach into the surrounding porous soil through the open jointed lining.
Separator. SeeInterceptor.
Septic Tank. A watertight receptacle to receive sewage from a building sewer or building drain which is designed and constructed to permit sufficient retention of wastewater to allow for the separation of scum and sludge and the partial digestion of organic matter before discharge of the liquid portion to a soil absorption system.
Sewage. Any liquid waste containing animal or vegetable matter in suspension or solution, and the waste may include liquids containing chemicals in solution.
Sewage Ejectors. A device for moving sewage by entraining it on a high velocity steam, air or water jet.
Sewage Pump. A permanently installed mechanical device, except an ejector, for removing sewage or liquid waste from a sump.
Siphon Breaker. A siphon breaker is a valve device, or appurtenance, constructed and installed to prevent back flow in the plumbing system or any portion thereof. (SeeBack-flow and Back-siphonage).
Slope. (SeeGrade).
Soil Pipe. Any pipe that conveys the discharge of toilets, urinals or fixtures having similar functions to the building drain or building sewer. The discharge may be conveyed with or without the discharge from other fixtures.
Special Waste. A waste, or combination of wastes, which because of its quantity, concentration, or physical, chemical, or infectious characteristics may cause, or significantly contribute to an increase in mortality or an increase in serious irreversible, or incapacitating reversible illness or pose a substantial present or potential hazard to human health, safety, or welfare or to the environment when improperly treated, stored, transported, used, or disposed of, or otherwise managed. See310 CMR 30.00: Hazardous Waste for possible exemptions and for "Mixed waste."
Special Wastes, Piping or Treatment. Wastes which require special treatment before entry into a normal plumbing system.
Special Waste Pipe. Pipes which convey hazardous wastes.
Stack. A general term for any vertical line of soil, waste, vent or inside conductor piping which extends beyond at least one branch interval in height.
Stack Group. A term that is applied to the location of fixtures in relation to the stack so that by means of proper fittings vents may be reduced to a minimum.
Stack Vent. The portion of a soil or waste stack that is six inches above the highest flood level rim of the highest fixture connected to the stack. The stack vent terminates in compliance with 248 CMR 10.16.
Stack Venting. A method of venting a fixture or fixtures through a soil or waste stack.
Sterilization. The act or process that is physical or chemical that results in the complete destruction of microorganisms.
Storm Drainage System. A system that is used for conveying rainwater, surface water, condensate, cooling water, sprinkler discharge or similar clear liquid wastes to the storm sewer or other place of disposal. The clear liquid waste conveyed excludes sewage or industrial waste.
Storm Sewer. A sewer used for conveying rainwater, surface water, condensate, cooling water, or similar clear liquid wastes.
Subsoil Drain. A drain that collects subsurface, ground or seepage water and conveys it to a place of disposal.
Sump. A tank or pit that receives sewage or liquid waste, that is located below the normal grade of the gravity drainage system, and that must be emptied by mechanical means.
Sump Pump. A mechanical device, except for an ejector, that removes clear liquid waste from a sump.
Supports - Hangers - Anchors. Devices for supporting and securing pipe, fixtures, and equipment, to walls, ceilings, floors or structural members.
Swimming Pool. Any structure, basin, chamber, or tank containing an artificial body of water for swimming, diving, or recreational bathing and having a depth of two feet or more at any point.
Trap. A fitting or device that provides a liquid seal that prevents the emission of sewer gases without materially effecting the flow of sewage or wastewater through it.
Trap Arm. That portion of a fixture drain or waste drain between the trap and its vent.
Trap Primer. A trap primer is a device or system of piping to maintain a water seal in a trap.
Trap Seal. The vertical distance between the crown weir and the top of the dip of the trap.
Treated Water. Potable water that has passed through a system for the purpose of purification, aeration, filtration, disinfection, softening, conditioning, fluoridation, stabilization, or corrosion correction and/or has had chemicals added which may alter its physical, chemical or radiological quality.
Troughs. An open conduit, drain, channel, trench or gutter.
Unisex/Gender-neutral Toilet Room. A room containing one toilet and one lavatory and a lockable door available for use by anyone.
Vacuum. Any pressure less than that exerted by the atmosphere.
Vacuum Breaker, Non-pressure Type (Atmospheric). SeeAnti-Siphon Vacuum Breaker -Non-pressure Type.
Vacuum Breaker, Pressure Type. SeeAnti-Siphon Vacuum Breaker - Pressure Type.
Vacuum Relief Valve. A device to prevent an excessive vacuum in a water storage tank or heater.
Vent - Automatic. A mechanical device that opens because of negative pressure in the drainage system to prevent trap siphonage, and closes gas and watertight when the pressure in the drainage system is equal to or greater than ambient pressure to prevent the entry of sewer gas into the building.
Vent Pipe. Part of a vent system.
Vent Stack. A vertical vent pipe installed to provide circulation of air to and from the drainage system.
Vent System. A pipe or pipes installed to provide a flow of air to or from the drainage system or to provide a circulation of air within such system to protect trap seals from siphonage and back pressure.
Vertical Pipe. Any pipe or fitting which makes an angle of 45° or less with the vertical plane.
Wall Hung Toilet. A wall mounted toilet installed in such a way that no part of the toilet touches the floor.
Waste. SeeLiquid Waste.
Waste Pipe. A pipe which conveys only waste.
Water Distribution Pipe. A pipe within the building or on the premises that conveys water from the water service pipe to the point of usage.
Water Filter. A device installed on a potable water system through which water flows for the reduction of turbidity, microorganisms, particulate matter, taste, color, odor or other contaminants.
Water Main. A pipe used to convey the public water supply.
Water of Questionable Safety. Water in a plumbing system that passes through an isolated portion of the water piping distribution system. The system is defined as beginning at the outlet of a backflow preventing device and ends at a point of final or actual connection with heating/cooling equipment or other fixtures, apparatus and appliances that require water for operation and process.
Water Outlet. As used in connection with a water-distribution system, a discharge opening for water:
Water Service Pipe. The pipe from the municipal water main or private other source of water supply to the water distribution system of the building served.
Water Softener. A device installed on a potable water system through which water flows for the reduction of hardness and other metals using the cation exchange process.
Water Supply System. The water service pipe, the water distribution pipes, and the necessary connection pipes, fittings, control valves, and all appurtenances in or adjacent to a building or premises.
Water Treatment Device. A device which means any instrument or product sold, rented or leased, or offered for sale, rental or lease designed or claimed either to benefit potable water systems or to treat water intended for human consumption or use; including but not limited to, instruments or products using filtration, distillation, absorption, adsorption/ion exchange, reverse osmosis or other treatment processes or technologies such as magnetic or electro-magnetic field and catalytic conversion which is claimed to alter the radiological, chemical or physical properties of water.
Wet Vent. A waste pipe that also serves as a vent, on the same floor level.
Workmanship. Work of such character that will fully secure the desired or needed results.
Yoke Vent. A pipe connecting at a 45 ° angle upward from a soil or waste stack to a vent stack and designed for the purpose of preventing pressure changes in the stack.
248 CMR, § 10.03