Copper pipes expand when hot water flows through ... and insert a piece of foam rubber (or foam insulation) between the pipe and the framing. One possible fix, according to mechanical contractor ...

Performance+ ® Earthwool ® 1000˚ Pipe Insulation: Durable and resilient, designed to handle maximum operating temperatures up to 1000ºF, making it ideal for iron, copper, and stainless-steel ...