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Old 11-30-2011, 05:46 AM   #16
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Replacing a Pressure Relief Valve for a Boiler


Thank you very much how.
I will drain about 3 cups, close the water supply and go from there. If I still see leaking, should I go ahead and order the pressure relief valve? Is the install simple enough?

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Old 11-30-2011, 05:51 AM   #17
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Replacing a Pressure Relief Valve for a Boiler


Easy---Unscrew the old one--screw in the new one---shut off the water--do it quickly and you don't even need to drain the system---
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Old 11-30-2011, 10:20 AM   #18
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Replacing a Pressure Relief Valve for a Boiler


Just make sure that you turn off the water feed first, before draining down the water pressure. You can swap out the relief valve if the leaking problem continues but I'd do it with the boiler cold and the pressure low. Nothing like dealing with spraying boiling water to accidently cross thread the new part when doing this for the first time.. You can test out the water pressure you still need to deal with before switching the old relief valve by lifting up its activating lever.
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Old 11-30-2011, 11:16 AM   #19
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Replacing a Pressure Relief Valve for a Boiler


when you drain the X tank don't repressurize it with a pump let the auto feed make up raise it with the new water feeding in then that should show 10-12 lbs cold with plenty of room for heating the water the pressure rise and the stat being satified....tops 20PSI when everything cycled off the relief is doing its job leave it...blow it off every now and then during a heating cycle....flush the crap build up on the seat....if your below 30 and it's drippng then change it

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