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Sewer, storm and drain
Below Ground Connections
Shielded and flexible couplings, lateral connections and access for buried sewer, storm and drain pipe. Join different materials, repair a line or tap a main.
Shielded couplings
Sewer pipe and accessories
Laterals
Shielded couplings
A stainless steel shield or shear ring for buried joints under earth load.
Shielded underground coupling
Strong Back RC
Fernco flexible sealing with a stainless steel shear ring, built for buried pipe transitions that face heavy earth loads and pipe movement.
Clay, cast iron, plastic, concrete, ductile iron and steel · 1000 Series
Made in USA · AIS/BABA (15″ and under)
Strong Back RC 5000 Series
Heavy-duty Strong Back sealing with a 316 stainless steel nut-and-bolt clamp, for larger underground transitions.
Nut-and-bolt clamp
Made in USA
HULK
One universal coupling per nominal size connects most common underground pipe materials, with stainless steel shear rods inside.
4″ to 12″
Made in USA
Strong Back HTRC
Join corrugated polyethylene pipe to PVC and other plastic pipe, or corrugated to corrugated, with a stainless steel shear ring.
10″ to 60″
XL Couplings
Built longer than our standard couplings to grip more pipe. With the Strong Back RC shield for unstable ground, heavy earth loads and alignment problems.
1½″ to 12″, up to 11.63″ long
AIS/BABA
Large Diameter
Engineered around the measured outside diameter of each pipe, for large sewer connections standard sizes don’t cover. Available with the Strong Back RC shield.
Built to your pipe O.D.s
Sewer pipe and accessories
Couplings for ribbed sewer pipe, shear rings for the couplings you have, and caps for large open pipe.
Shear Rings
Add a stainless steel shield to a Fernco coupling to resist shear and keep the pipe ends aligned.
1½″ to 15″ couplings
Ultra-Rib Couplings
For Ultra-Rib and ETI-sized PVC sewer pipe. Repair or extend a line, or transition it to SDR 35.
12″ to 24″
Custom Debris Caps
Made to your pipe’s outside diameter. A soil-tight cap built for burial that keeps dirt and debris out of open pipe ends.
6.50″ O.D. and larger
Laterals
Tie a service line into a main.
QwikSeal
Core the main, push it in, clamp it. For concrete, clay and PVC mains. One molded gasket and one 316 stainless clamp, tested to ASTM C923.
4″ to 8″ laterals
Made in USA
Flexible Tap Saddles
Wrap an existing sewer main and add a 4″ or 6″ tee or wye branch, without replacing the main.
4″ and 6″ branch
Made in USA · AIS/BABA
Shielded or not
Built to hold under load
Below ground, backfill, compaction and settling can put shear on a buried joint. A stainless steel shield helps carry that load and helps keep the pipe ends in line.
A non-shielded coupling is the right fit for many jobs, and many local codes accept it below ground. Where burial depth, soil conditions, a material transition or the project spec call for added support, we recommend a shielded coupling.
- Heavy earth loads and deep burial
- Unstable or shifting soil
- Transitions between different pipe materials
Conditions vary by region and job. Follow the project specifications and your local codes.
Under load: non-shielded (top) and Strong Back RC shielded (bottom)
Made in USA
Many of these products are built in the USA by the Fernco team.
Manufacturing
Built here
Strong Back RC 1000 Series 15″ and under and the 5000 Series, HULK, QwikSeal and Flexible Tap Saddles are made in the USA.
AIS and BABA
Ready for funded projects
Strong Back RC 1000 Series couplings 15″ and under, XL Couplings and Flexible Tap Saddles are on our AIS and BABA compliant list. The tap saddle pressure kit is excluded.
Submittals
Need a letter?
Request an AIS and BABA compliance letter for your project.
Working above grade?
Above Ground Connections
Standard and Proflex couplings, Qwik Tees and Ells, Qwik Caps and more for drain, waste and vent pipe above ground.
Where to next
Stock it, find it or ask us about it.
Distributors and retailers
Carry Fernco underground couplings
Shielded and flexible couplings and lateral connections for sewer and drain contractors, municipalities and site work.
- Parts for plumbers, site contractors and municipal crews
- Sell sheets, drawings and install instructions ready to share
- Fernco reps in the field to support your counter and your customers
Plumbers and homeowners
Buy it
Find Fernco underground couplings at plumbing and waterworks supply houses near you.
Questions
Ask us
Not sure which coupling fits? Our team can help, or a local rep can.