Originally Posted by roodman
Sounds good. I wonder just how much pressure our rigs will take before blowing up?
The water heater relief valve is set to open at 125 psi, that is the system safeguard. Every component I've checked including the large clear plastic inlet filter is clearly labeled "working pressure 125 psi". System pressure is highest when the water heater is nearing operating temperature with gas is the heat source. You'll notice the relief sometimes simmer, at it's rated opening pressure. Bye the way the pex piping pressure rating is much higher than 125 psi.