The MetFit fitting construction is elegantly simple. The stiffener, with its exterior sealing grooves, is insert-molded into the super-tough nylon housing. The stainless steel compression ring is then pulled over the nylon compression ridges with a simple installation tool. The high compression force causes the pipe to cold flow into the stiffener sealing grooves, creating a hermetic seal on the inside surface. MetFit 3-Way Tees help gas installers save time and money by allowing the branching of services with one coupling rather than the multiple fusions that traditional installations may require. Select the appropriate MetFit tool for proper installation.