The older plumber left a over tighten copper pipe (threaded) to the shower valve. I tried but couldnt remove it with wrench. I dont want to use too much force as it may break the valve. I wonder if there is anything I can apply to it to help loosing it? Like WD40? I can see the teflon tap wraping around the thread and so it shouldnt be this hard.
Remove over tighten copper pipe fitting
copperfittingremoval
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Best Answer
First, check the basics:
To protect the valve and safeguard other plumbing, be sure to provide counter-force at the other side of the joint with a similar wrench or vicegrips, etc.
In my experience, WD-40 is no help with plumbing.