The Fernco Hulk 4 Coupling delivers serious strength and unmatched versatility for underground pipe repairs. Engineered with embedded stainless steel rods to resist shear forces and withstand ground movement, it features high-torque clamps (up to 120 in-lbs.) and corrosion-resistant components that ensure long-term performance in harsh conditions. Ideal as a backup on any service truck, the Hulk 4 connects multiple pipe materials-including clay, PVC, cast iron, and Orangeburg-without the need to carry an array of different coupling types. The Hulk4 offers a generous dimensional range of 4.20 in. to 5.60 in. pipe OD, making it the perfect solution when unexpected variations threaten to delay your job. Rated for a maximum test pressure of 4.3 PSI for DWV applications, it complies with ASTM C 1173 and CSA B602.