Same as a studor vent, Allows air to enter the drainage system only when a negative pressure exists.
Air Admittance Valve
An indirect waste line that discharges below the flood level rim of the drain.
The unobstructed vertical distance through the free atmosphere between the outlet of the waste pipe and the flood level rim of the drain.
Air Gap ( drainage)
The unobstructed vertical distance through the free atmosphere between a pipe or faucet supplying water and the flood level rim of the tank or receptacle
Air Gap (water supply)
Acceptable to the code official or other authority having jurisdiction
A group of fixtures consisting of a water closet,lavatory,bathtub or shower, including or excluding a bidet, an emergency floor drain or both. Such fixtures are located together on the same floor.
Any part of the piping system except a riser, main or stack.
A vertical measurement of distance, 8 feet or more between the connections of horizontal branches to a drainage stack.
A vent connecting one or more individual vents with a vent stack or stack vent
The lowest part of the drainage system in a building that extends 30" beyond the exterior of the building.
That part of the drainage system that extends from the building drain to the public sewer or private disposal system.
A vent that connects to a horizontal drainage branch and vents two traps to a maximum of eight traps connected into a battery.
A specially designed system of waste piping embodying the horizontal wet venting of one or more sinks, lavatories,drinking fountains or floor drains by means of a common waste and vent pipe adequately sized to provide the free movement of air above the waste flow line of the drain
Combination Waste & Vent System
A vent connecting at the junction of two fixture drains or to a fixture branch and serving as a vent for both fixtures.
A pipe inside a building that conveys storm water from the roof to a storm or combined building drain
A branch leading from a soil, waste or vent pipe and terminating at a develop length of 2 feet by means of a cap or plug.
The length of a pipeline measured along the centerline of the pipe and fittings.
A measure of the probable discharge into the drainage system by various types of plumbing fixtures.
DFU or Drainage Fixture Unit
A floor drain that does not receive the discharge of any drain or indirect waste pipe, and protects against damage from accidental spills,fixture overflows and leakage.
Emergency Floor Drain
A drain serving two or more fixtures that discharge to another drain or to a stack.
The drain from the trap of a fixture to a junction with any other drain pipe.
Water discharged from lavatories ,bathtubs, showers,clothes washers and laundry trays.
Plumbing appurtenances that are installed in a sanitary drainage system to intercept free floating fats, oils and grease from waste water discharge.
A drainage branch pipe extending laterally from a soil or waste stack or building drain that receives the discharge from two or more fixture drains or branches.
Horizontal Branch Drain
Any pipe or fitting that makes an angle of less than 45 degrees with the horizontal.
A waste pipe that doesn't connect directly with the drainage system but discharges through an air gap or air break.
Indirect Waste Pipe
A pipe installed to vent a fixture trap and that connects with the vent system above the fixture served.
An exterior drainage pipe for conveying rain water from the roof to an approved means of disposal.
Water-connected or drainage-connected devices intended to perform a special function such as a water heater.
A manufactured device, prefabricated assembly or an on-the-job built component that is an adjunct to the basic piping system and plumbing fixtures such as strainers or filters.
A receptacle or device that is connected to a water supply or discharges to a drainage system or both.
That which enables a fixture, appliance or equipment to be directly reached without requiring the removal or movement of any panel , door or similar obstruction and without the use of a ladder.
A vent whose primary funcation is to provide circulation of air between drainage and vent systems,
Any liquid waste containing animal or vegetable matter in suspension or solution , including liquids containing chemicals in solution.
The fall of a line of pipe in reference to a horizontal plane.
A pipe that conveys sewage containing fecel matter to the building drain or building sewer
A general term for any veritcal line of soil, waste, vent or conducter piping that extends through at least one story with or without offsets.
The extension of a soil or waste stack above the highest horizontal drain connected to the stack
The method of wet venting where a uniformly oversized vertical drain serves as the vent for one or more independently connected waste fixtures.
A tank or pit that receives sewage or liquid waste, located below the normal grade of the gravity system and that must be emptied by mechanical meams.
Water having a temperature range between 85º F (29º C) and 110º F (43º C)
A fitting or device that provides a liquid seal to prevent the emission of sewer gases without materially affecting the flow of sewage or waste water through the trap.
The vertical distance between the weir and the top of the dip of the trap.
A vertical vent pipe installed primarily for the purpose of circulation of air to and from any part of the drainage system.
Any pipe or fitting that makes an angle of 45 degrees or more with the horizontal.
The discharge from any fixture, appliance,area appurtenance that doesn't contain fecal matter.
A pipe that doesn't convey fecal matter .
A pipe connecting upward from a soil or waste stack to a vent stack for the purpose of preventing pressure changes in the stacks.