I'm in the process of tearing out carpet and installing laminate in my guest bedroom. After I got the carpet out, I discovered a hole several inches across underneath the wall that borders the garage. The other wall, which is a foot or so away, is an exterior wall. In the center of the hole is a copper pipe (~1/2" diameter) with pipe insulation around it.
I THINK it runs outside to my A/C unit, but I'm not sure why it's running into the slab, since the line for the A/C exits a few inches up the brick. The evaporator is in the attic.
Can I just fill in the void with concrete patch? Do I need to wrap the pipe with anything first?
Best Answer
Bare copper will eventually corrode if it is in left in direct contact with concrete over time.
You can try wrapping the pipe in duct tape and then covering it with sand, then skim coating over the top with concrete. That way, you could get access to the pipe again if you needed to.