I have a soldered copper water pipes that terminate in a 3/4" male thread adapter. That is screwed into a brass gate valve female-female. The valve won't close fully.
I want to cap the pipe. I can use a pipe plug on the brass valve or remove the valve and use a pipe cap on the copper thread adapter. I don't want to un-solder the thread adapter for a sweat cap.
Shopping around, I find plugs and caps in PVC, galvanized iron or black iron. Copper threaded caps seem nonexistent and brass ones are rare and expensive.
I don't want to use solder because it involves soldering.
I don't want to use brass or copper because the stuff is expensive. Can I get away with PVC? This is all on cold pipe. What's my best choice to avoid galvanic corrosion problems?
Best Answer
You could cut off the threaded adapter so you have plain copper pipe, then push on a Shark-Bite cap (they're about $6-8 at most home centers or hardware stores).
Otherwise, a stainless steel cap could be used if you're having a hard time sourcing an affordable brass threaded cap.