Stainless Steel Insert Fitting is used to make secure, watertight connections to Polyethylene piping, which is used in a wide variety of indoor and outdoor applications. This is used as that will make them easier to install, last longer, and hold greater pressure. This fitting is very effective and economical to use. It is very easy to install as well as simple to operate. The smooth internal surface of this fitting created by the swage or investment casting method reduces turbulence and friction loss as water flows through the fitting.