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Extra length for extra strength
XL Couplings
Built longer than our standard couplings to grip more pipe, for pipe alignment problems and thermal movement. Choose Strong Back RC for unstable ground and heavy earth loads.
1½″ to 12″
Up to 11.63″ long
Non-shielded or Strong Back RC
AIS and BABA compliant
What they’re for
More coupling on every pipe
XL Couplings fit the same pipe outside diameters as our standard couplings, with up to nearly three times the length on 4″ pipe. More coupling grips more pipe for greater holding power where pipe alignment or thermal movement is a concern.
Standard 1056-44 (4.00″) compared with XL 1056-442 (7.75″) and 1056-443 (11.63″), for 4″ pipe.
Alignment
Pipe alignment problems
Extra length for connections where pipe alignment is a problem.
Movement
Thermal expansion
More coupling on each pipe to protect the joint as pipe expands and contracts.
Grip
More holding power
The extra length grips more pipe. The 6″ to 12″ sizes add clamp bands.
Same fit
Standard pipe sizes
Fits the same pipe outside diameters as our standard couplings, 1½″ to 12″.
Versions
Non-shielded or Strong Back RC shielded
Non-shielded
The extra-long flexible coupling with 300 series stainless steel clamps, tightened to 60 in-lb. For pipe alignment problems and thermal expansion and contraction.
Strong Back RC shielded
Adds a .012″ thick, 300 series stainless steel shear ring over the coupling to secure pipe from unstable ground and structures and to resist heavy earth loads. XL Strong Back RC couplings come with two more clamp bands than a standard Strong Back RC coupling, for greater holding power. Part numbers end in RC.
Why shielded
Built to hold under load
Buried couplings can face earth loads, settlement and shear. Where they do, the Strong Back RC shear ring wraps the coupling and helps keep the joint rigid and in line.
Conditions vary by region and job. Always follow the project specifications and your local codes and regulations when choosing a coupling.
Sizes
Find your size
XL Couplings fit the same pipe outside diameters as the matching standard and Strong Back RC couplings. Measure both pipes, find the range that covers them, then pick non-shielded or Strong Back RC. No calipers? Wrap a tape around the pipe and divide by 3.14.
| Non-shielded | Strong Back RC | Connects | Fits pipe O.D. | Length |
|---|---|---|---|---|
| 1056-1502* | 1056-1502RC* | 1½″ CI, plastic or steel to 1½″ CI, plastic or steel | 1.65–2.00″ both ends | 6.88″ |
| 1056-222* | 1056-222RC* | 2″ CI, plastic or steel to 2″ CI, plastic or steel | 2.35–2.40″ both ends | 7.88″ |
| 1056-332* | 1056-332RC* | 3″ CI, plastic or steel to 3″ CI, plastic or steel | 3.15–3.70″ and 3.10–3.70″ | 7.75″ |
| 1056-442* | 1056-442RC* | 4″ CI, plastic or steel to 4″ CI, plastic or steel | 4.15–4.35″ both ends | 7.85″ |
| 1056-443* | 1056-443RC* | 4″ CI, plastic or steel to 4″ CI, plastic or steel | 4.25–4.45″ both ends | 11.75″ |
| 1056-552* | 1056-552RC* | 5″ CI, plastic or steel to 5″ CI, plastic or steel | 5.50–5.50″ both ends | 7.85″ |
| 1056-662 | 1056-662RC | 6″ CI or plastic to 6″ CI or plastic | 6.30–6.80″ both ends | 10.00″ |
| 1056-882 | 1056-882RC | 8″ CI or plastic to 8″ CI or plastic | 8.00–8.75″ both ends | 10.00″ |
| 1056-10102 | 1056-10102RC | 10″ CI or plastic to 10″ CI or plastic | 10.65–10.85″ both ends | 10.00″ |
| 1056-12122 | 1056-12122RC | 12″ CI or plastic to 12″ CI or plastic | 12.65–12.85″ both ends | 10.00″ |
| RC only | 1002-442RC | 4″ clay to 4″ plastic or CI | Clay 5.00–5.55″ Plastic or CI 4.00–4.60″ | 10.00″ |
| RC only | 1002-662RC | 6″ clay to 6″ plastic or CI | Clay 7.05–7.75″ Plastic or CI 6.25–6.80″ | 10.00″ |
| RC only | 1002-882RC | 8″ clay to 8″ plastic or CI | Clay 8.95–10.00″ Plastic or CI 7.94–8.66″ | 10.25″ |
| RC only | 1002-10102RC | 10″ clay to 10″ plastic or CI | Clay 12.00–12.70″ Plastic or CI 10.25–10.90″ | 10.25″ |
| RC only | 1002-12122RC | 12″ clay to 12″ plastic or CI | Clay 13.75–14.70″ Plastic or CI 11.95–12.75″ | 10.25″ |
For standard-length couplings, see Standard Couplings. *Two clamps per coupling, not including the shield. Fit ranges in inches, the same as the matching standard size (for example, 1056-442 fits the same pipe as 1056-44). CI = cast iron.
Specifications.
| Sizes | 1½″ to 12″ |
| Coupling | Manufactured to the requirements of ASTM C1173 |
| Gasket | Manufactured to the requirements of ASTM C1173, ASTM D5926 and CSA B602 |
| Hardness | Shore A 65 ±5 |
| Tensile strength | 1,000 psi minimum |
| Elongation at rupture | 250% minimum |
| Tear strength | 150 in/lb minimum |
| Brittleness temperature | −40°F |
| Clamps | 300 series stainless steel. Installation torque 60 in-lb. |
| Shear ring (Strong Back RC) | .012″ thick, 300 series stainless steel |
| Compliance | AIS and BABA compliant |
Documents.
The XL flyer and the catalog page.
Got questions?
Whether it’s sizing, an odd fitting or a tricky tie-in, our team can help. Reach out, or find your Fernco rep.