I've had two licensed plumbers look at my series 2 burnham gas boiler. The pressure relief valve always leaks a good deal of water whenever it operates. One wasn't worried. The other wants to replace the relief valve and the fill. So far neither has convinced me they know what's going on, especially since, over the years, they've looked at the problem more than once. I don't know much about this, but when I started to look it up, I began to think the boiler was too small. The boiler serves a five story, maybe 5-6 thousand square foot building. When the boiler operates, the psi rises to 45-50. Well above the 30 psi it is set for. This is what causes the pressure relief valve to open. Can the feed valve simply be adjusted, or replaced? Or is the working pressure of this boiler simply too low to heat this building? Are either of the plumbers on the right track? Thanks so much.

Can someone tell me where to find the part number for the circulation pump. It is a B and G. At the end of last season it was making a horrible noise and there was metal shavings. I figure the bearing is shot. Anyhow I would like to know how much to expect this part to be. Thanks Bob