P&T valve

noway2

noway2

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Atwood Water heater. Told its aluminum tank, brass P&T needs to be replaced. Got replacement. Tried to remove wity sized socket on 7/8th” wrench fitting (suggests heavy duty) to remove old valve. Couldn’t budge it. Got suggestion for longer wrench with pipe extension and hit it with hammer. Theoretically force on threads is tightening / clockwise direction.

Considered getting out AC and impact wrench as they pulse rather than constant force we would be more direct in line torque than by off of axis like by hand with wrench and pipe.

What say the CFF experienced crew?
 
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noway2 said:
Atwood Water heater. Told its aluminum tank, brass P&T needs to be replaced. Got replacement. Tried to remove wity sized socket on 7/8th” wrench fitting (suggests heavy duty) to remove old valve. Couldn’t budge it. Got suggestion for longer wrench with pipe extension and hit it with hammer. Theoretically force on threads is tightening / clockwise direction.

Considered getting out AC and impact wrench as they pulse rather than constant force we would be more direct in line torque than by off of axis like by hand with wrench and pipe.

What say the CFF experienced crew?
Click to expand...

This sounds like a large scale version of an issue I had with a bathroom faucet. @BASIL saved my bacon and I’ll bet he can save yours too.
 
I’d use the impact and some penetrating oil. Best to alternate between loosening and tightening in 3 - 5 second increments.

The impact has a better chance of breaking it loose versus steady force (ie pipewrench).
 
Have you tried to apply any heat?

Heat up and then let it cool back down to room temp, this may help break the threads loose.
 
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