Plumber Water & Drainage Flashcards
7 cards from real PC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Plumber Water & Drainage flashcards as text
What is the minimum size of a building sewer that serves a single-family home under the IPC?
Answer: 4 inches
The IPC requires a minimum 4-inch diameter building sewer for a residential structure.
What is the term for negative pressure in a drain system that pulls water out of fixture traps?
Answer: Siphonage
Siphonage is the negative pressure (vacuum) that pulls trap water seals out, allowing sewer gases to enter the building.
A plumber installs a dishwasher drain. Where must the drain hose be routed before connecting to the drain or disposal?
Answer: In a high loop or through an air gap above the flood level rim of the sink
A dishwasher drain must be looped high under the counter or use an air gap to prevent back-siphonage of contaminated water into the dishwasher.
What type of vent serves as both a drain and a vent for the same fixture?
Answer: Wet vent
A wet vent serves simultaneously as a vent for one fixture and a drain for another fixture connected above it.
Under the IPC, what is the minimum water pressure required at the point of use for a residential fixture?
Answer: 20 psi
The IPC requires a minimum of 20 psi at the point of delivery for any plumbing fixture.
What is the correct way to orient a sanitary tee when used in a horizontal drain line?
Answer: Outlet pointing up (upright)
Sanitary tees must be installed upright (outlet pointing up) in horizontal drain lines to direct flow toward the vertical stack.
Which material is NOT approved for use as a DWV (drain, waste, and vent) pipe under the IPC?
Answer: CPVC
CPVC is a pressure pipe material approved for hot and cold water supply but is not listed for use in DWV applications.