This Allegheny 20444BB is a 4-inch Mark V coupling designed to join grooved-end pipe on tank trailer and industrial fluid transfer systems. Constructed of ductile iron with a black E-coated finish for corrosion resistance, it uses a black Buna-N gasket and carries a maximum operating pressure rating of 300 psi.
Size: 4 inches Material: Ductile Iron, Black E-Coated Gasket Material: Buna-N (Black) Maximum Working Pressure: 300 psi Style: Mark V Coupling