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Old 01-03-2009, 02:49 AM   #1
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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!


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Old 01-03-2009, 06:23 AM   #2
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Leaking Presure valve on furnace


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.

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Old 01-03-2009, 09:09 AM   #3
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Leaking Presure valve on furnace


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
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Old 01-03-2009, 12:18 PM   #4
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Leaking Presure valve on furnace


Here are the pictures..








Last edited by Carloscda; 01-04-2009 at 06:42 PM.
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Old 01-05-2009, 04:01 PM   #5
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Leaking Presure valve on furnace


This is the valve I was referring to.
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Old 01-06-2009, 10:41 AM   #6
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Leaking Presure valve on furnace


Ayuh,...

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

Replace it...
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Old 01-06-2009, 01:52 PM   #7
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Leaking Presure valve on furnace


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.
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Old 02-12-2009, 01:27 PM   #8
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Leaking Presure valve on furnace


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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