pipingNow available in diameters up to 24 inches, Aquatherm Climatherm is designed for chilled water, condensing water, and radiant heating applications. The heat-fused polypropylene-random pipe’s R-value of 1 means it can be installed without — or with minimal — insulation. Sized from 3/8 to 24 inches (equivalent), Climatherm can handle operating temperatures up to 200°F and is rust-proof and scale resistant.