Journeyman Plumber ExamPlumbing Code and RegulationsEasy
A journeyman plumber is tasked with installing a new water heater in an existing residential dwelling. The local plumbing code specifies that a temperature and pressure (T&P) relief valve discharge pipe must terminate within 6 inches of the floor. What is the maximum height above the floor that the discharge pipe's end can be, according to this code requirement?
- A0 inches
- B6 inches
- C12 inches
- D18 inches
Show answer & explanationAnswer & explanation
Correct answer: B. 6 inches
The code explicitly states that the T&P relief valve discharge pipe must terminate within 6 inches of the floor. Therefore, the maximum height allowed is 6 inches.
Why the other options are wrong
- A. Terminating at 0 inches is allowed, but not the maximum.
- C. This height exceeds the specified 6-inch maximum.
- D. This height significantly exceeds the specified 6-inch maximum.
T&P Valve Discharge Termination Height
The end of a temperature and pressure (T&P) relief valve discharge pipe must terminate within a specified distance from the floor or receptor to prevent scalding and ensure proper drainage.
- Typically terminates 6 inches above the floor or into an indirect waste receptor.
- Prevents accidental scalding by discharging hot water downwards.
- Ensures proper function of the relief valve.
Memory trick: Hot water drops, no higher than a ruler's half.