The time-proven Dresser Style 90 Coupling is also available in an insulating version for joining steel to steel and steel to polyethylene pipes listed in ASTM D2513. This coupling can be used to make quick pipe joints when positive restraint AND electrical isolation are required. Like the Style 90 product line, the insulating coupling is easily installed using only a common pipe wrench. Pipe ends are stabbed without disassembling the coupling, thus reducing the risk of lost parts in the ditch. Pipe joint connections made in accordance with the Dresser Style 90 Insulated Restraining installation instructions meet or exceed the requirements of D.O.T. 192.283(b).