OK I did an inspection a few weeks ago and 1 item noted was the lack of any water heater discharge pipe. They asked me to go reinspect that and other items I called out. OK all was done satisfactorily except the discharge is copper with some type of metal (looks brass or something to me)l fittings? also they appear to ba a compression type. My concern is the “dissimilar” metals ? is this a No No or is it acceptable? I think it’s a no no
http://www.watts.com/pages/support/tp.asp?catId=64 Temperature and Pressure (T&P) relief valves
Temperature and pressure (T&P) relief valves used on residential water heaters are typically designed and manufactured to relieve on pressure at 150 psig and on temperature at 210 degrees F. These ASME, ANSI and CSA (AGA) approved relief valves protect the water heater from excess pressures and temperatures by discharging water.
Oh how many calls I have received about the approval of plastic discharge.
No writing and sold at Canadian tire and Home Depot.
There are ones approved and the writing is stamped on the stem.
But you are right Larry! 210 degrees F is the min.