PEX fittings are used to join, route, and cap water service and radiant heat tubing. They are formed from heavyweight plumbing brass bar stock and are completely certified and safe for potable water systems. Our PEX fittings are made in accordance with ASTM F197-4 and CSA B137-9/B137-10. Our PEX fittings are easy to install and provide a secure connection using common crimp rings.