Delta shower stop shut off screws frozen.

[Bjmealy]

I cannot turn off shower valve shut off screws on either side of removed cartridge. Waiting to replace the valve altogether. No water in house.
Should I heat them? Blue plastic valve was stuck in pipe and copper was damaged along with ring getting it out. While I regroup this weekend I would like water in rest of house.
I'm looking at 3 days without water. Could o put a sharkbite on end of copper pipe for a few days. Thanks for any ideas.

 

[John Gayewski]

The way those shut the water to the valve off is with o rings, so heating it wont be very good for them.

Where is it leaking from? The valve body? Ifmso you could go buy another valve which will come with a plug for the body. The head? You could put a cap on the shower arm.