Plumbing Questions? Ask a Plumber and Get Answers ASAP.
Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.
You don't have to if it's not necessary for some other purpose like they are in an area that you walk over all the time. If you do cover the PVC with concrete to have to wrap the pipes so the concrete doesn't come in direct contact with the PVC
Pipe insulation is the easiest. You just don't want the concrete to come in contact with the PVC because the PVC expands when it heats up and the concrete can wear a hole in it
Just the pipe insulation is all you need
Any type of pipe insulation. There are products like a kind of foam tape that you can wrap around the pipe there's regular split foam insulation that's easier to use if you have the room (click on the links in blue). HD may not have larger sizes of the split foam in stock (1 1/2", 2") so you'd need to go to a plumbing supply house for that
Do you have any more questions?