Fixtures
The minimum number of water closets required is based on this factor in an occupancy.
What is occupant load?
A pipe that carries wastewater containing fecal matter.
What is a soil pipe?
The minimum slope for 3-inch horizontal drainage pipe.
What is 1/8 inch per foot?
This valve is required on all storage water heaters to prevent explosion from overheating.
What is a T&P (temperature and pressure relief) valve?
The minimum pressure required at plumbing fixtures for proper operation.
What is 20 psi?
The required minimum clearance in front of a water closet or bidet.
What is 21 inches?
The vertical pipe that extends through the roof to allow air into the drainage system.
What is a vent stack?
The maximum distance a trap can be from its vent on a 2-inch trap arm.
What is 5 feet?
The pipe connected to a T&P valve must terminate at this type of location.
What is an approved indirect waste or floor drain?
This device is required to protect the potable water system from backsiphonage at hose connections.
What is a hose bibb vacuum breaker?
The minimum trap size for a residential bathtub.
What is 1½ inches?
The unobstructed vertical distance through the free atmosphere between the outlet of a faucet and the flood level rim.
What is an air gap?
This type of tee fitting is prohibited in the horizontal drainage position.
What is a sanitary tee?
The minimum size discharge pipe from a T&P relief valve.
What is ¾ inch?
The minimum size water service for a one- and two-family dwelling.
What is ¾ inch?
This fixture must be provided in food establishments for employee handwashing.
What is a hand sink (lavatory)?
A fitting installed to permit access for cleaning drainage piping.
What is a cleanout?
The vent that connects to a horizontal drain between the trap and the building drain.
What is a vent stack / individual vent?
Water heaters located in garages must be elevated this minimum height above the floor.
What is 18 inches?
The required air gap for a dishwasher discharge into a sink.
What is twice the diameter of the effective opening?
The device required on a public lavatory to limit water temperature to prevent scalding.
What is a temperature limiting device / mixing valve?
Wastewater from fixtures such as sinks, showers, and laundry but not toilets.
What is gray water?
The required test for DWV systems using either water or this pressure of air.
What is 5 psi of air?
The device required to protect the potable water system from thermal expansion.
What is an expansion tank?
This type of valve is required at the entrance of the water service to allow the building water to be shut off.
What is a main shutoff valve?