tmy23
New Member
Greetings and as always thanks in advance for all help. I've a 2 WM boiler system, running into a primary loop then to 3 house zones, managed by a WM management "computer". A couple years ago I sweated a pressure gauge on the supply line after the autofill value but before the boilers/expansion tank so I didn't have to get in an awkward position to check system pressure at the boilers.
Boilers are 20+ years old and when I fired the system up this season, notice one was pushing a little water through the PRV. I have an old victorian, all 3 floors heated and so try to keep the pressure around 23 to get heat to the attic. Noticed no matter how much I refill the system to 23, I'd find a little water in the bucket under the "leaking" PRV and that particular gauge at 20. Incidentally I assume I have some aging gauges because the gauge on one boiler shows 40PSI, no discharge, the "leaking PRV boiler" shows shows about 25 and the gauge I installed right after the autofill is 20. Both PRV's look original as do the gauges.
So I (maybe incorrectly) concluded the PRV is faulty and was going to replace it. Before that question I've a few others. (1) shouldn't pressure be the same across all three locations i.e. pressure in the 2 boilers and the gauge right after the autofill all measure the same? If not is faulty gauges the likely suspect? Is there anyway to determine what the actual system pressure is?
(2) If I end up replacing the PRV (and/or) the gauges for that matter, is there any particular order to the steps particularly refilling? I was planning to isolate the boilers from the primary loop, remove and replace each valve, then refill top down using the autofill until the air remover stopped emitting air, then reconnect the boilers to the loop and restart the system.
Sorry for the lengthy post. THANKS!!!
Boilers are 20+ years old and when I fired the system up this season, notice one was pushing a little water through the PRV. I have an old victorian, all 3 floors heated and so try to keep the pressure around 23 to get heat to the attic. Noticed no matter how much I refill the system to 23, I'd find a little water in the bucket under the "leaking" PRV and that particular gauge at 20. Incidentally I assume I have some aging gauges because the gauge on one boiler shows 40PSI, no discharge, the "leaking PRV boiler" shows shows about 25 and the gauge I installed right after the autofill is 20. Both PRV's look original as do the gauges.
So I (maybe incorrectly) concluded the PRV is faulty and was going to replace it. Before that question I've a few others. (1) shouldn't pressure be the same across all three locations i.e. pressure in the 2 boilers and the gauge right after the autofill all measure the same? If not is faulty gauges the likely suspect? Is there anyway to determine what the actual system pressure is?
(2) If I end up replacing the PRV (and/or) the gauges for that matter, is there any particular order to the steps particularly refilling? I was planning to isolate the boilers from the primary loop, remove and replace each valve, then refill top down using the autofill until the air remover stopped emitting air, then reconnect the boilers to the loop and restart the system.
Sorry for the lengthy post. THANKS!!!