The terminal end of the drain pipe shall not be threaded 2010 cpc 608 5 discharge from a relief valve into a water heater pan shall be prohibited.
Water heater pressure relief valve discharge pipe code california.
The discharge piping serving a pressure relief valve temperature relief valve or combination valve shall.
Unlike the expansion tank which is intended to protect the piping system from pressure the tprv protects the water heater tank from experiencing.
The california water heater code is part of a larger statewide california plumbing code and has several very specific restrictions.
Pressure temperature relief valve cpc 504 4 504 5 and 608 5 all water heaters have a pressure temperature p t relief valve that is galvanized steel hard drawn copper or cpvc.
Its proper functioning is the difference between a nice hot shower and an explosion.
Asme code paragraphs u 68 and u 69 tanks shall have safety valve capacity sufficient to prevent pressure in the tank from exceeding 135 percent of the allowable working pressure of the tank.
I always use the 18 rule with copper pipe before transitioning to pex pipe.
The temperature pressure relief valve tprv is an incredibly important life safety device on every water heater.
8 termination of the tpr drain pipe cannot be more than 6 inches or less than two pipe diameters above the floor ground or waster receptor.
The discharge piping serving a temperature relief valve pressure relief valve or combination of both shall have no valves obstructions or means of isolation and be provided with the following.
Discharge through an air gap located in the same room as the water heater.
At a minimum any water heater shall be secured in accordance with the california plumbing code or modifications made thereto by a city county or city and county pursuant to section 17958 5.
Surface area flow rate surface area flow rate surface area flow rate.
2015 upc chapter 6 water supply and distribution page 105 section 608 5 discharge piping.
Which reads as follows.
Not be smaller than the diameter of the outlet of the valve served and shall discharge full size to the air gap.
March s featured code change.
T p valve the temperature and pressure relief valve is an important safety device which goes off when your tank exceeds 210.
Relief valve drains shall not terminate in a building s crawl space.
A trapped tpr dischage pipe is a common defect when a replacement water heater s tpr valve is lower than the original one and the installer connects to the exisitng discharge piping at the wall.
The valve shall be drained to the exterior terminate toward the ground maintaining between 6 and 24 of clearance from the ground and point downward.
