First supply store I showed the guy a pic of the valve he gave me a 35psi valve that did not work out well.
Either the system is getting too much water pressure when cold (could be 7-10#) or the bladder tank is bad if the pressure is going over 35 psi
Yeah. Although I have only ever seen 30 PSI used. Could you read the tag on the old valve? You definitely want to have the correct one on there...could get expensive (and even worse, dangerous) having a 150 on a 30 PSI system. See if you can find a data tag on the boiler somewhere that says what its rated to run at. And look at the makeup water valve/regulator, see what pressure it is...12 PSI is common...that means if the system pressure goes below 12 PSI the valve will open and allow water in.
Hmm...I guess I will have to defer to someone with more expertise than me on this one...but didn't you say the guy that put this system in was a hack? I'd still look for a data tag on the boiler...
My "spidey senses" are telling me that 150PSI is wrong...maybe yooperdave would know something about all this...
Sorry, my boiler experience is next to nothing! But, I do know that typical operating domestic boiler pressures are only 12-15 psi.
The hot water at your washing machine or anywhere else for that matter is isolated from the boiler water by a coil in the water tank. The hot water is at street pressure 35-50 PSI (or more), your boiler should be much, much lower, closer to 10 0r 15 PSI.
Do you still have the 35 PSI valve? (even that one is potentially a bit high) If so, you could put it back on and let it leak...then turn off the makeup water...if the leaking stops then the makeup regulator is bad.