Sanitary Drainage Systems Flashcards
7 cards from real CPD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Sanitary Drainage Systems flashcards as text
What is the minimum slope required for a 4-inch horizontal sanitary drain pipe per the IPC?
Answer: 1/8 inch per foot
The IPC requires a minimum slope of 1/8 inch per foot for horizontal drain pipes 4 inches in diameter.
Which type of fitting is NOT permitted for use in horizontal-to-horizontal sanitary drain connections?
Answer: Short-pattern quarter bend (sanitary tee used horizontally)
A sanitary tee used in a horizontal-to-horizontal configuration causes turbulence and is not permitted; wyes and long sweeps are required.
In a building sanitary drainage system, what is the primary purpose of a cleanout?
Answer: Allow access for drain cleaning
Cleanouts provide access points in the drainage piping so that obstructions can be removed with drain-cleaning equipment.
The developed length rule for horizontal drain pipes states that a cleanout must be provided every:
Answer: 100 feet
The IPC requires cleanouts at maximum 100-foot intervals along horizontal drain piping.
Which of the following correctly describes the term 'wet vent'?
Answer: A vent pipe that conveys both air and wastewater simultaneously
A wet vent is a pipe that serves as both a drain for one fixture and a vent for another fixture simultaneously.
What does the term 'critical level' mean in relation to a backflow preventer installed on a sanitary system?
Answer: The elevation marking below which backflow can occur
The critical level (CL) marks the flood level reference point on a backflow preventer, below which backpressure or backsiphonage could cause contamination.
According to IPC drainage fixture unit (DFU) values, a residential bathtub is rated as how many DFUs?
Answer: 2
The IPC assigns a residential bathtub a drainage fixture unit value of 2.