Just picked up a new Watts M1 prv for my boiler and in reading the yellow tag that is attached noticed that it is not to be used on coal or wood fired boilers having an uncontrolled BTU heat output. What PRV should be used for wood and coal units? 30# is 30# right?
Thanks, I thought it was alot of BS. Iwas in the supply house today and asked about the disclaimer and the guts pulled some other sizes off the shelf and all had the same thing on them. Maybe they want a the valves with the weights hanging on a chain. More weight , more pressure! or just wire it closed...LOL