Re: O/T Question for HVAC guys

Posted by Randy Losey on May 21, 2007 at 09:16:03 from (156.108.217.62):

In Reply to: O/T Question for HVAC guys posted by Pete-IN on May 20, 2007 at 19:43:20:

I am a plumber and it sounds as if you already have some excellent advice. Most of the time that a relief valve is leaking or discharging water, there is something going on that is making it do so. I would check the following and both have been mentioned already.
1. Pressure reducing valve could be letting more than the normal 12-15 pounds into the system.
2. The expansion tank is water logged and could be caused by a bad bladder or improper air pressure. Start by using a tire guage and check the little valve stem, you should have 10 or 11 pounds of air pressure. If you have more pressure than your water valve is letting in, it will not have pressure to expand and contract as it is made to do. If when you let air out of that stem, if there is water present, the bladder is bad and must replace tank.
Also as mentioned, do not just get any relief valve as the one you need is preset at 30psi. Hope all of this helps and as always there are lots of good help on this site.

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