John Donley
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A pressure relief valve rated at 30 psi., 535,000 btu/hour discharged no water the 1st 2005 heating season----Through 2006 it began to discharge small amounts of water. This heating season it could discharge 3 gallons in 2 days. I replaced the valve with one rated at 30psi 510,000 btu/hour... Can anyone comment on this replacement Re: the btu/hour figure. Because I do not know the relationship of the btu/hour rating on the valve