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Stainless steel reinforced universal coupling
HULK
Universal Coupling
One coupling per nominal size joins clay, cast iron, concrete, ductile iron, plastic, steel, Orangeburg and Duriron below ground. Stainless steel shear rods inside the body help it hold under soil load. 4″ to 12″. Made in the USA.
Cast Iron
Clay
Concrete
Ductile Iron
Plastic
Orangeburg
Duriron
Steel
Built for unknown underground connections
One coupling. Multiple pipe connections.
When the pipe material is uncertain, the HULK keeps the job moving. Its wide dimensional range helps crews connect common sewer and drain pipe materials with one universal coupling per nominal size.
- Universal connection
- Stainless reinforcement
- Wide O.D. range
- Underground approved
Coupling per size
1
Carry six sizes, not dozens.
Pipe materials
8
Clay to PVC, cast iron to Orangeburg.
Nominal sizes
4″–12″
Available in the core sizes crews reach for most.
Internally reinforced
Stainless steel shear rods inside
The HULK is reinforced internally with corrosion-resistant stainless steel rods to help resist pipe shift from soil, traffic or settlement. The rods help resist shift from soil, traffic and settling.
- Shear resistance
- Underground strength
- Stainless hardware
- Patented design
Meets IPC, UPC, ASTM C1173 and CSA B602
Use it when you don’t know what pipe you’ll find, or when the job calls for more strength than a standard coupling.
Complies with IPC, UPC, ASTM C1173 and CSA B602. U.S. Patent No. D956937. Made in the USA.
Specs
Specs
Key product details for quick review. Always verify final selection using current Fernco literature and the actual pipe outside diameter.
Construction
| Body | Reinforced elastomer |
| Reinforcement | Internal stainless steel shear rods |
| Clamps | Stainless steel, high torque |
Application
| Use | Below-ground sewer & drain repair |
| Best for | Transitions, repairs, unknown pipe material |
Sizes and coverage
| Sizes | 4″–12″ (HULK4–HULK12) |
| Materials | Clay, cast iron, ductile iron, concrete, plastic, steel, Orangeburg, Duriron |
Compliance
| Codes | IPC, UPC |
| Standards | ASTM C1173, CSA B602 |
| Patent | U.S. D956937 |
| Origin | Made in the USA |
HULK sizes
One coupling per nominal size, each with a wide outside-diameter range. Confirm the actual pipe O.D. falls within the range for the size.
| Part number | Nominal size | O.D. range |
|---|---|---|
| HULK4 | 4″ | 4.20″ – 5.60″ |
| HULK5 | 5″ | 5.30″ – 6.70″ |
| HULK6 | 6″ | 6.20″ – 8.00″ |
| HULK8 | 8″ | 8.40″ – 10.15″ |
| HULK10 | 10″ | 10.50″ – 12.75″ |
| HULK12 | 12″ | 12.50″ – 15.30″ |
Size finder
Choose the material and size of the pipe on each side. The finder returns the HULK size that fits both pipes, plus any Strong Back RC coupling whose ends accept them. Plastic and steel use Schedule 40 (IPS) outside diameters.
Watch a HULK install
Documents
Product literature, sales support and engineering information for the HULK Universal Coupling.
Sales Sheet
Product overview, key benefits, applications and sizing information.
Trifold Brochure
Distributor and contractor-friendly product overview for the HULK.
Engineering Spec Sheet
Specification support for engineers, municipalities and submittals.
Common questions
Selection, materials and compliance answers for the HULK.
What makes the HULK different from a standard coupling?
The HULK is a stainless steel reinforced universal coupling with a wider dimensional range. It is built for tough underground repair conditions where the pipe material or outside diameter can vary.
What pipe materials can the HULK connect?
One HULK coupling per nominal size connects most common sewer and drain pipe materials, including clay, concrete, ductile iron, Orangeburg, Duriron, cast iron, steel and plastic. Always confirm the actual pipe outside diameter falls within the range for the size.
Is the HULK approved for underground use?
Yes. The HULK is engineered for below-ground sewer and drain repair applications.
How do I select the correct HULK size?
Start with the nominal pipe size, then measure the actual outside diameter of the pipe and confirm it falls within the listed O.D. range for that HULK part number. The size finder on this page does this for you.
What standards does the HULK comply with?
The HULK complies with IPC, UPC, ASTM C1173 and CSA B602, and is covered by U.S. Patent No. D956937. It is made in the USA. Because it uses a high-torque clamp, the HULK is not AIS or BABA compliant.
Stop guessing. Bring the HULK.
Tell us the pipe materials and sizes on each side and our team will confirm the right HULK for the job.