I am not a plumber, but im having trouble with a clients solar hot water heater. the actual hot water heater keeps blowing the relief valve. it is attached to the the solar panel and is only there to come on if the temp dips below a certian temp. it also has a recuclatory pump. (spelled wrong) i replaced the pressure relief valve because it would open and would not shut on its own. i installed a new one and it worked like a charm for 2 days then it keeps reliefing itself, too much pressure.. from where??/ im confused, do i need a expansion tank maybe? why would there be to much pressure in the system? shouldnt there be a relief vave up on the roof attached to the solar panel? i havent been up there to look yet but will this weekend... what is my next step, besides calling a plumber...
thanks for any advice.....
thanks for any advice.....