Each PVC-Lock® fitting contains a stainless-steel retainer ring and an O-ring seal, preventing leaking at both low and abnormally high pressures. Using PVC-Lock® fittings allows you to “lose the glue” and reduces traditional installation times by over 50%. With PVC-Lock® you’ll leave your project with clean hands and a clear conscience knowing that your installation crew and the environment are being protected from harmful chemicals.