i have a leaky tp valve on my hot water boiler. The valve is rated at 30 psi and 155,000 btu. I can't find one with that btu rating. will a higher rating work?
You can absolutely use one with a higher btu rating., but not with a higher pressure rating. Just be aware that this valve has a much lower blowoff point than a typical hot water heater tp valve, so be very sure of the PRESSURE rating on the new valve. (should be 30 psi, just like the old one) You may want to check to be sure that your expansion tank isn't water logged, and that your boiler pressure isn't too high.(shouldn't be much more than 15psi or so, unless you have a multi story house). Expansion tank or water feeder pressure regulating valve may be having issues,....sometimes there's a reason why the tp valves leak. Hope this helps
Don't go by the the old valve, look at the specification tag on the boiler. Do not exceed the temp or pressure rating. If you do, you will only create a time bomb and a big one at that. In no circumstances should you use a valve with a higher rating than the heater!
