Watts Radiant now offers RadiantPEX-AL, a multi-layer pipe consisting of an inner and outer layer of high temperature-resistant polyethylene with an aluminum core. The aluminum core prevents oxygen and gases from permeating into the pipe, making it a non-corrosive pipe. RadiantPEX-AL holds its shape and is flexible enough to bend around obstacles without the use of fittings. RadiantPEX-AL doesn’t expand like PEX, so it creates less noise in a staple-up application. It can be used with or without plates.