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Carloscda 01-03-2009 02:49 AM

Leaking Presure valve on furnace
I recently noticed this valve dripping, it's off of a line coming out of the furnace in a "L" shape.
Is it safe just to turn the heat off & replace this valve?

Thanks in advanced!


TazinCR 01-03-2009 06:23 AM

If it is the stem packing just tighten the nut some or try back setting the handle. Is it a humidifier line, boiler or what. Some pictures would help.

metx 01-03-2009 09:09 AM

could be a worn pv valve or to much pressure in the system .look at the label on the valve it should say 35 psi ,then look at the gauge on the boiler . could be your expansion tank if hot water

Carloscda 01-03-2009 12:18 PM

Here are the pictures..

Carloscda 01-05-2009 04:01 PM

This is the valve I was referring to.

Bondo 01-06-2009 10:41 AM


That's the Safety Blow-off Valve....

Replace it...

Termite 01-06-2009 01:52 PM

Of course you'll need to turn the unit off and let it cool down to release pressure first. Don't want you getting burned.

It's called a T&P (temp and pressure) blowoff valve. They're $5.

Carloscda40 02-12-2009 01:27 PM

I picked up the replacement part for this from Home Depot ($20)
Do I have to drain the system, if so how?

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