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