Worm Gear Clamp Coupling
Shielded, high-performance repair coupling
Built for Strength. Designed for Versatility.
Shielded, high-performance repair couplings designed to connect both same and different pipe materials and sizes. Featuring a durable stainless steel shield and nut & bolt clamps, these couplings are built to handle the job underground. They're designed to withstand substantial earth pressure, resist shear forces, and maintain proper pipe alignment — even in shifting or unstable soil conditions.
Ideal for non-pressure, gravity flow applications such as sewer and storm drain systems, they’re easy to install and available in a full range of sizes.
Features
- Robust Construction: Equipped with a 0.012" stainless steel shield, these strongback couplings offer enhanced structural integrity.
- Precision Fit: The integrated molded bushing ensures a secure and accurate connection between pipes.
- Flexible: Couplings connect pipe of different sizes and materials from 1.5” to 96” diameter.
- Withstand Compression and Tension: Unlike other manufactures’ PVC thermoplastic couplings, we combine synthetic rubbers which allow for increased flexibility and distortion without altering essential physical of chemical resistance.
- Resists Corrosion: Rust-proof stainless steel clamping bands.
- Durable and Impervious: Leak proof, root proof, and resistant to ultra violet rays, fungus growth, chemicals, and normal sewer gases.
- Tight Fitting: Stainless steel (300 and 316 series) worm drive glamping bands hold pipe ends securely in place.
Built Tough. Backed by Design. Benefits include:
Withstands heavy earth loads, shear forces, and deformation.
Creates watertight seal preventing leaks and root intrusion.
Accommodates variations in pipe diameters for precise fit.
Distributes load forces across the pipe interface.
Maintains alignment while allowing for ground movement and pipe settlement.
Resists corrosion in demanding environments (underground, marine, contaminated soils).
Remains pliable and easy to install in cold weather.
Provides leak-proof, root-proof protection.
Resists UV rays, fungus growth, chemicals, and normal sewer gases.
Additional Resources
Worm Gear Clamps: 304 Series Steel, 316 available upon request
Shear Band/ Shield: 0.012” thick, 304 series Stainless Steel with two to four worm gear clamps, 316 stainless steel available upon request
Coupler Gasket: One-piece, precisions molded, EPDM elastomeric gasket
Available Sizes
For 4 inches (100 mm) to 27 inches (685 mm). Custom sizes available upon request. Click here.


ASTM C 425 - Standard Specification for Compression Joins for Vitrified Clay Pipe and Fittings
ASTM C 1173 - Standard Specification for Flexible Transition Couplings for Underground Piping Systems [📃 View]
ASTM A240/A240M - Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
Meet Standard Specifications for Public Works Construction Standard Specifications
(Greenbook)
UPC / IAPMO
IPC
ISO
Please reach out to us, and we can assist in getting any guides, or documentation you may need.
Email info@jointscouplings.com or Call (626)448-2100.
01 Series Specs.

Clay to Clay
02 Series Specs.

Clay to Cast Iron / Plastic / PVC
03 Series Specs.

Clay to Asbestos Cement / Ductile Iron / C900
04 Series Specs.

Concrete to Concrete
06 Series Specs.

Concrete to Cast Iron / Plastic / PVC
07 Series Specs.

Clay to Concrete
51 Series Specs.

Asbestos Cement / Ductile Iron / C900 to Cast Iron / Plastic / PVC
55 Series Specs.

Asbestos Cement / Ductile Iron / C900 to Asbestos Cement / Ductile Iron / C900
56 Series Specs.

Cast Iron / Plastic / PVC to Cast Iron / Plastic / PVC