Can PEX be used for underground cold-water service applications?
Yes. Although the high temperature resistance of PEX makes it particularly suitable for hot and cold interior plumbing applications, it also makes an excellent underground water service piping. The new AWWA C904 standard also applies to PEX used in this application. PEX can be installed using the same fittings recommended for copper tube sized SDR-9 polyethylene tubing.
Yes. Although the high temperature resistance of PEX makes it particularly suitable for hot and cold interior plumbing applications, it also makes an excellent underground water service piping. It can be installed using the same fittings recommended for copper tube sized SDR-9 polyethylene tubing. Question and answer courtesy of Plastic Pipe and Fittings Association (PPFA). More information is available at: http://www.ppfahome.org/pex/faqpex.
