PC Plumbing Codes & Regulations Flashcards

Under the IPC, what is the minimum distance a vent terminal must be from a window, door, or air intake opening?

Answer: 3 feet

Vent terminals must be located at least 3 feet from any window, door, or air intake to prevent sewer gases from re-entering the building.

A plumber needs to install a sanitary tee fitting in a drainage system. In which orientation is a sanitary tee allowed to be installed?

Answer: Vertically only

Sanitary tees may only be installed in the vertical position on drainage systems; horizontal installations require a wye and 1/8 bend combination.

What is the purpose of the 'wet vent' system in residential plumbing?

Answer: To allow a drain pipe to also serve as a vent for another fixture

A wet vent is a drain pipe that simultaneously serves as a vent for one fixture while draining another, reducing the number of pipes needed.

Per the IPC, which of the following materials is NOT approved for use as a DWV (drain, waste, and vent) pipe?

Answer: Galvanized steel

Galvanized steel is not approved for DWV use under the IPC because it corrodes from the inside when exposed to sewage, leading to premature failure.

What is the minimum number of fixture units that a 3-inch building drain must be able to handle according to the IPC fixture unit table?

Answer: 20 fixture units

Per the IPC, a 3-inch horizontal building drain sloped at 1/4 inch per foot can handle a maximum of 20 fixture units.

According to plumbing codes, what is the minimum required water pressure at a fixture in a residential building?

Answer: 20 psi

The IPC requires a minimum static water pressure of 20 psi at any fixture to ensure adequate flow for normal use.