Compatible with ASTM F1807/F2159/F1960/F3347 and ASSE 1061 fitting systems;Ideally suited for radiant heating/cooling and snow-melt systems;Sioux Chief strongly recommends all F1960 expansion joints with PowerPEX Type-B tubing be made with a self-rotating, power expansion tool;Refer to Sioux Chief's PowerPEX Installation Manual for detailed information