a valve designed to allow proper flow to a fixture that closes itself after operation to reseal the fixture trap
flushometer tank
an integrated device designed to discharge a predetermined amount of water for flushing
flood hazard area
an area that has a 1% or greater chance of flooding or is designated as a flood hazard on a flood hazard map
fixture fitting
a fitting that controls the volume of water
fill valve
a water supply valve opened or closed by means of a float or similar device used to supply water to a tank
faucet
the valve end of a water pipe from which water is drawn or held
flush tank
a tank designed with a fill valve and flush valve to flush the bowl
gray water
water from lavs, tubs, showers, clothes washers, and laundry trays
gridded water distribution system
a water distribution system where every water pipe is interconnected as to provide multiple paths to each fixture supply pipe
label
an identification applied on a product by the manufacturer
leader
an exterior drainage pipe that conveys storm water from roofs or gutters to an approved means of disposal
indirect waste pipe
a waste pipe not directly connected to the drainage system that discharges by an air break or air gap
individual water supply
a water supply that serves one or more families and is not an approved public water supply
interceptor
a device to separate undesirable matter that allows normal waste to discharge by gravity
horizontal drainage branch
a drainage pipe connected to a soil, waste stack or building drain that receives the discharge of 2 or more fixture drains or branches
effective opening
the minimum cross-sectional area at the point of water supply discharge
existing installations
any previously installed plumbing system for which an approval has been issued
discharge pipe
a pipe that conveys discharge
depth of trap seal
the depth of liquid that would have to be removed from a trap before air could pass through
drain
any pipe that carries waste water or water borne waste
combination fixture
a fixture combining a sink and laundry tray in one unit
combination waste and vent system
a horizontal wet vent system used for sinks, lavs, floor drains or drinking fountains sized to provide free movement of air above the flow line of the drain
conductor
an inside pipe that conveys storm water from the roof to the storm drain
concealed fouling surface
any surface not cleansed with each fixture operation
critical level
the elevation level below which there is a potential for backflow
yoke vent
a pipe connecting the soil or waste stack to the vent stack to prevent pressure changes in the stacks
vacuum breaker
a device that prevents water from being siphoned backward into the public drinking system
water pipe (raiser)
a pipe that conveys water and extends 1 or more stories
water pipe (distribution)
a pipe that conveys water from the service pipe to the place of utilization
water pipe (service)
the pipe from the supply to the distribution system
waste receptor
a device that receives the discharge of waste pipes and carries them by gravity to the sanitary drainage system
water heater
any heating device that heats potable water for the water distribution system
water main
a public owned water supply pipe
vacuum
any pressure less than atmospheric pressure
unstable ground
earth without a sturdy uniform bearing
vertical pipe
any pipe with an angle of 45 degrees or more
waste
the discharge from any fixture or device that does not contain fecal matter
vent system
a vent pipe installed to allow circulation of air to and from the drainage system to protect trap seals from siphonage and back pressure
water hammer arrestor
a device used to absorb the pressure surge created when water flow is suddenly stopped
waste pipe
a pipe that conveys only waste
water supply system
the water service pipe distribution pipes and all connecting pipes and fittings