Watts Radiant WaterPex Non-Barrier pex tubing, for use in potable water or heating applications using no cast iron components or potable water systems.
WaterPEX is manufactured in accordance with American Standard Testing Methods F-876 and F-877 to SDR-9 dimensional standards.
It is listed by the National Sanitation Foundation NSF-61 for use in potable water systems. WaterPEX labeled "NSF CL-R" meets the requirements for use in chlorinated domestic continuous recirculation systems.
WaterPEX is also listed by the International Conference of Building Officials (ICBO), the International Association of Plumbing and Mechanical Officials (IAPMO) and carries the Uniform Plumbing Code symbol.
WaterPEX is tested and certified to the Canadian Standard Association (CSA) standard B137.5.