Hello all,
I have a Weil Mclain Gold CGa boiler that is about ten years old and the backflow preventer let out some water. The pressure reducing valve has green deposits at the bottom of the brass union nut which has developed a small leak. It's a Bell and Gosett 1/2" pressure reducing valve and Watts 1/2" backflow preventer:
https://www.supplyhouse.com/Watts-0063190-BBFP-1-2-IPS-Backflow-Preventer
The expansion tank seems fine. I tapped on the upper half which sounded full and the lower half which sounded hollow. I removed the cap at the bottom and it was dry, no water leaking out.
So I need to replace the pressure reducing valve and backflow preventer at a minimum. I plan on leaving the expansion tank because it appears to be fine for now.
I have one shutoff valve before the pressure reducing valve and another shutoff valve right after before the water enters the boiler, so I can isolate the pressure reducing valve and backflow preventer by closing the two valves.
To do the repair I need to:
1. shutoff both water valves to isolate the pressure reducing valve and backflow preventer
2. turn off the burner
3. remove the pressure reducing valve and backflow preventer
4. install the new pressure reducing valve and backflow preventer
5. open both shutoff valves closed in step 1. and turn the burner back on.
Am I missing any required steps for this repair?
Do I need to increase the pressure on the pressure reducing valve or leave it at the factory setting of
12 psi? The house is two story.
Is it necessary to drain the boiler and purge air from the zones before turning the boiler back on?
My guess is no because the parts being replaced are isolated from the system by the two shutoff valves.
Thank you in advance.
I have a Weil Mclain Gold CGa boiler that is about ten years old and the backflow preventer let out some water. The pressure reducing valve has green deposits at the bottom of the brass union nut which has developed a small leak. It's a Bell and Gosett 1/2" pressure reducing valve and Watts 1/2" backflow preventer:
https://www.supplyhouse.com/Watts-0063190-BBFP-1-2-IPS-Backflow-Preventer
The expansion tank seems fine. I tapped on the upper half which sounded full and the lower half which sounded hollow. I removed the cap at the bottom and it was dry, no water leaking out.
So I need to replace the pressure reducing valve and backflow preventer at a minimum. I plan on leaving the expansion tank because it appears to be fine for now.
I have one shutoff valve before the pressure reducing valve and another shutoff valve right after before the water enters the boiler, so I can isolate the pressure reducing valve and backflow preventer by closing the two valves.
To do the repair I need to:
1. shutoff both water valves to isolate the pressure reducing valve and backflow preventer
2. turn off the burner
3. remove the pressure reducing valve and backflow preventer
4. install the new pressure reducing valve and backflow preventer
5. open both shutoff valves closed in step 1. and turn the burner back on.
Am I missing any required steps for this repair?
Do I need to increase the pressure on the pressure reducing valve or leave it at the factory setting of
12 psi? The house is two story.
Is it necessary to drain the boiler and purge air from the zones before turning the boiler back on?
My guess is no because the parts being replaced are isolated from the system by the two shutoff valves.
Thank you in advance.