Fixtures & Water HeatersQuestion 175 of 360
Which of the following is prohibited on a water heater relief valve discharge line?
a.Running it to the outside of the building
b.Installing a trap in the line
c.Using CPVC rated for hot water
d.Sizing it full to the valve outlet
Explanation
A trap must never be installed in a relief discharge line because standing water could freeze or block the emergency path. The line must drain freely by gravity with no valves or traps. It may terminate outside or to an approved receptor with an air gap.
Law Reference: 2022 California Plumbing Code (CPC) §608.5Practice all 360 questions free — no signup required.
Related questions on this topic
- How must a water heater relief valve discharge pipe flow to its point of discharge?
- 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?
- California requires storage water heaters to be braced against earthquakes. What is the minimum number of straps required?
- When strapping a gas water heater, the lower seismic strap must be located:
- Seismic straps for a water heater must be anchored to what?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against California CSLB C-36 Plumbing Trade Examination · How we review