I have an Oil fired hot water heating system. The pressure relief valve on top of the furnance or boiler is leaking. I found the valve to shut off the incoming water supply from the well to the boiler.
Before I remove the valve to replace it, must I drain down the system. There is a boiler drain valve at the base of the boiler. How much water must I remove from the system, or can I just shut the water intake valve, let it cool down & remove the valve? I'm not sure how to do it. Also I assume when I refill the system, any air in the water lines will exit out the puge valve that is mounted at the water inlet valve.
The pressure valve that's leaking is a Watts No 335 Size 3/4" Set 30 lbs BTU per hour rating. ASME 510.000 I assume I need to find the same replacement at the plumbing supply. Thanks for the help everyone.
Before I remove the valve to replace it, must I drain down the system. There is a boiler drain valve at the base of the boiler. How much water must I remove from the system, or can I just shut the water intake valve, let it cool down & remove the valve? I'm not sure how to do it. Also I assume when I refill the system, any air in the water lines will exit out the puge valve that is mounted at the water inlet valve.
The pressure valve that's leaking is a Watts No 335 Size 3/4" Set 30 lbs BTU per hour rating. ASME 510.000 I assume I need to find the same replacement at the plumbing supply. Thanks for the help everyone.