✓ One coupling per nominal size joins clay, cast iron, ductile, plastic, steel, copper & concrete ✓ Stainless steel ribbed shear shell — holds the joint rigid against ground movement ✓ High-torque 316 stainless clamps, corrosion resistant for buried service ✓ Meets ASTM C1173, IPC, UPC and CSA B602 — passes inspection High Demand Item – Frequently Reordered by Contractors The Fernco Hulk is a heavy-duty universal coupling built for sewer and drain repairs where two pipes of different material or outside diameter have to come together. A full stainless steel shear shell wraps the sleeve, so the joint resists shear loads and ground shift instead of flexing under them — the difference between a repair that holds and one you go back to. The sleeve is molded from elastomeric PVC for a leak-proof seal that stands up to chemicals and sewer gases. Two high-torque 316 series stainless steel clamps lock it down, and a single coupling spans a wide outside-diameter range at each nominal size — so one part transitions between most common pipe materials. Available 4″ through 12″. Applications Transitioning between dissimilar pipe materials in sewer and drain lines Joining new pipe to existing clay, cast iron, ductile iron or Orangeburg pipe Underground sewer and storm drain repairs Connecting pipes of different outside diameters at the same nominal size DWV repair and tie-ins where the joint must resist shear Cast iron, Duriron, steel, copper, concrete and plastic (SDR-35, Schedule 40/80, C900/C905) connections Key Features Stainless steel ribbed shear shell for a rigid, non-shear connection High-torque 316 series stainless steel clamps, corrosion resistant Elastomeric PVC sleeve — leak-proof, resistant to chemicals and sewer gases Wide outside-diameter range at each nominal size One universal coupling per nominal size connects most pipe materials U.S. Patent No. D956937 Specifications Sleeve Material Elastomeric PVC Shear Shell Stainless steel, ribbed Clamps 316 series stainless steel, high-torque Standards ASTM C1173, IPC, UPC, CSA B602 Patent U.S. Pat. No. D956937 Available Sizes 4″, 5″, 6″, 8″, 10″, 12″ Dimensional Range by Size (Outside Diameter) Part No. Nominal Size O.D. Range HULK4 4″ 5.60″ – 4.20″ HULK5 5″ 6.70″ – 5.30″ HULK6 6″ 8.00″ – 6.20″ HULK8 8″ 10.15″ – 8.40″ HULK10 10″ 12.75″ – 10.50″ HULK12 12″ 15.30″ – 12.50″ Documents & Video Download the Hulk Engineering Spec Sheet (PDF) Watch the Hulk Coupling video if it doesn’t play above. Best Used For Buried sewer and drain repairs that need to resist shear and ground movement Material transitions where a standard band coupling isn’t rigid enough Larger-diameter repairs, 4″ up to 12″ Tying new work into old pipe of an unknown or oversized outside diameter FAQ What pipe materials does it connect? Clay, concrete, ductile iron, Orangeburg, Duriron, cast iron, steel, copper and plastic — one coupling per nominal size. Check the part’s outside-diameter range against your pipe before ordering. How is the Hulk different from a standard flexible coupling? The Hulk adds a full stainless steel shear shell over the sleeve, so the joint stays rigid and resists shear loads. Standard band couplings flex; the Hulk is built to hold the line straight on larger and dissimilar-material repairs. How do I size it? Order by nominal pipe size, then confirm both pipe outside diameters fall inside that part’s O.D. range in the table above. A single size covers a span of diameters. Is it approved for underground use? Yes. It’s a universal sewer and drain repair coupling that complies with ASTM C1173, IPC, UPC and CSA B602. Why Contractors Choose This One part on the truck covers most material transitions at each size Stainless shear shell means fewer callbacks on buried repairs Code-compliant out of the box — ASTM C1173, IPC, UPC, CSA B602 Wide O.D. range takes the guesswork out of matching old pipe American-made by Fernco ✓ Complies with ASTM C1173, IPC, UPC & CSA B602 ✓ Stainless steel shear shell with 316 series stainless steel clamps ✓ U.S. Patent No. D956937 ✓ American-made by Fernco Buy More. Save More. Stocking the truck or buying for a job? Call 615-291-9103 or email [email protected] for job-lot and volume pricing on Hulk couplings.
