Permasert couplings have been accepted as an industry standard and helped utilities throughout the world simplify service line installations and save money. The reason for this success is simple. Permasert couplings are safe and remarkably easy to install. In addition, Permasert couplings are non-corrosive and require no cathodic protection or protective coatings. Permasert couplings utilize a tapered collet and a stainless steel support ring to “grip” the tubing. With this system, the greater the pull-out force, the more tightly the collet grips the tubing. As a result, the pull-out strength of Permasert couplings is greater than the connected polyethylene tubing. Under normal conditions, the Permasert coupling imparts almost no stress on the PE tubing. The coupling’s one-piece construction esures consistent, gas-tight connections in any weather condition.