This series of reusable air-tight molded couplings was introduced specifically to replace expensive two piece removable metal couplings. The couplings are injection molded of a UV protected glass fiver reinforced nylon, and underground applications with today’s blown fiber technology. The couplings are reusable, removable, lightweight, seal completely to 200 lbs. psi.. The coupling body, rubber gasket and stainless steel fasteners are essentially impervious to corrosion. No special tools are required to install the couplings except a battery powered or hand held nut driver.