Nibco® PEX fittings are lightweight, easy to install and maintenance-free. Joining can be accomplished with Nibco® copper crimp ring, copper sleeves, stainless steel sleeves, or stainless steel clamps. The Nibco® PEX system requires fewer fittings than traditional rigid plumbing systems resulting in fewer potential leak paths. Nibco® PEX tubing, fittings, valves, and manifolds are designed to be used as a complete system, and are backed by a NIBCO INC. limited warranty.