Fixtures & Water HeatersQuestion 172 of 360
How must a water heater relief valve discharge pipe flow to its point of discharge?
a.Uphill to an overhead receptor
b.Level with no slope
c.Downward, draining by gravity
d.Through a pump to grade
Explanation
The discharge pipe must run downward from the valve so it drains completely by gravity to the point of discharge. Any low spot, trap, or upward run could hold water and freeze or block the line. Continuous fall keeps the relief path clear.
Law Reference: 2022 California Plumbing Code (CPC) §608.5Practice all 360 questions free — no signup required.
Related questions on this topic
- A T&P relief valve discharge pipe terminating outside the building must end how far above the ground or receptor?
- Which condition is required at the terminal end of a water heater relief valve discharge pipe?
- A plumber is routing the discharge from a water heater T&P valve. Which installation is code-compliant?
- The material used for a water heater T&P relief valve discharge pipe must be:
- When a T&P relief discharge terminates to an indoor location such as a floor drain or pan, an air gap is required. Where must that air gap be located?
- Which of the following is prohibited on a water heater relief valve discharge line?
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