1000 SERIES STRONG BACK
- EXTRA STRENGTH FOR UNDERGROUND CONNECTIONS : Strong Back RC Couplings are designed to resist heavy earth loads and shear forces while helping improve pipe alignment in demanding underground applications.
- SHIELDED FOR ADDED SUPPORT : Featuring a .012" stainless steel shear ring and molded-in bushing, these couplings reinforce Fernco’s flexible sealing performance for a stronger, more stable connection.
- VERSATILE TRANSITION PERFORMANCE : Available in a wide range of configurations for clay, cast iron, plastic, concrete, ductile iron and more, Strong Back RC Couplings provide reliable underground transition solutions across many pipe materials and sizes.
PRODUCT DESCRIPTION
Fernco Strong Back RC Couplings are engineered to add extra strength to underground pipe connections where resistance to heavy earth loads and shear forces is critical. Designed with a flexible elastomeric sleeve, molded-in bushing and stainless steel shear ring, these couplings help provide improved alignment while maintaining a secure, dependable seal across a wide range of pipe materials. Strong Back RC Couplings are ideal for connecting clay, cast iron, plastic, concrete, ductile iron and other piping systems in underground applications where durability and performance matter.
Specifications
Coupling:
- Coupling Standards: Manufactured to conform to ASTM C1173 and CSA B602 performance requirements
- Installation Torque: 60 in-lbs.
- Maximum Test Pressure: 4.3 PSI (29.6 KPA)
- Maximum Operating Temperature: 140° F non-consistent
Gasket:
- Standards: Manufactured to meet material requirements of CSA B602, ASTM D5926 and ASTM C1173
- Hardness: Shore “A” 65 ±5
- Tensile Strength: 1000 psi minimum
- Elongation at Rupture: 250% minimum
- Tear Strength: 150 lb/in. minimum
- Brittleness Temperature: -40° F
Clamp:
- Clamp Housing: 301 stainless steel
- Clamp Band: 301 stainless steel
- Clamp Screw: 305 stainless steel
Shear Ring:
- Shear Ring: .012" thick, 300 series stainless steel
- Shear Ring Widths: Manufactured according to coupling width (1.50", 2.13", or 4")
Strong Back RC Part Numbers
| Part No. | Side A (in) | Side A (mm) | Side B (in) | Side B (mm) | Width C (in) | Width C (mm) |
|---|---|---|---|---|---|---|
| 1001-44RC | 5.29 | 134.37 | 5.29 | 134.37 | 4.10 | 104.14 |
| 1001-44WCRC | 5.51 | 139.95 | 5.51 | 139.95 | 3.97 | 100.84 |
| 1001-64RC* | 7.50 | 190.5 | 5.50 | 139.70 | 6.02 | 152.91 |
| 1001-66RC | 7.50 | 190.5 | 7.50 | 190.50 | 6.02 | 152.91 |
| 1001-66WCRC | 7.87 | 199.90 | 7.87 | 199.90 | 5.925 | 150.50 |
| 1001-88RC | 9.65 | 245.11 | 9.65 | 245.11 | 5.99 | 152.15 |
| 1001-88WCRC | 10 | 254.00 | 10 | 254.00 | 5.945 | 151.00 |
| 1001-1010RC | 12.40 | 314.96 | 12.40 | 314.96 | 5.90 | 149.86 |
| 1001-1010WCRC | 12.40 | 314.96 | 12.40 | 314.96 | 5.90 | 149.86 |
| 1001-1212RC | 14.51 | 368.55 | 14.51 | 368.55 | 6.38 | 162.05 |
| 1001-1212WCRC | 15.25 | 387.35 | 15.25 | 387.35 | 6.42 | 163.07 |
| 1001-1515RC | 18.14 | 460.76 | 18.14 | 460.76 | 9.89 | 251.21 |
| 1001-1818RC | 21.90 | 556.26 | 21.90 | 556.26 | 9.63 | 244.60 |
| 1001-2424RC | 28.97 | 735.84 | 28.97 | 735.84 | 9.89 | 251.21 |
* Supplied with reducer.
Maximum Test Pressure: 4.3 PSI (29.6 KPA)
Maximum Operating Temperature: 140° F non-consistent
| Part No. | Side A (in) | Side A (mm) | Side B (in) | Side B (mm) | Width C (in) | Width C (mm) |
|---|---|---|---|---|---|---|
| 1002-43RC* | 5.29 | 134.37 | 3.38 | 85.85 | 4.10 | 104.14 |
| 1002-44RC | 5.36 | 136.14 | 4.51 | 114.55 | 4.07 | 103.38 |
| 1002-44WCRC | 5.44 | 138.18 | 4.55 | 115.57 | 3.96 | 100.58 |
| 1002-46RC* | 6.60 | 167.64 | 5.13 | 130.18 | 5.74 | 145.80 |
| 1002-55RC* | 6.60 | 167.64 | 5.50 | 139.70 | 5.74 | 145.80 |
| 1002-64RC* | 7.50 | 190.5 | 4.50 | 114.30 | 6.02 | 152.91 |
| 1002-64WCRC | 7.84 | 199.14 | 4.5 | 114.30 | 5.955 | 151.26 |
| 1002-64WCRC-SDR | 7.84 | 199.14 | 4.38 | 111.25 | 5.955 | 151.26 |
| 1002-66RC | 7.50 | 190.5 | 6.56 | 166.65 | 5.89 | 149.68 |
| 1002-66WCRC | 7.84 | 199.14 | 6.52 | 165.61 | 5.955 | 151.26 |
| 1002-86RC* | 9.65 | 245.11 | 6.63 | 168.40 | 5.99 | 152.15 |
| 1002-88RC | 9.76 | 247.95 | 8.57 | 217.63 | 5.96 | 151.38 |
| 1002-88WCRC | 10 | 254.00 | 8.49 | 215.65 | 5.92 | 150.37 |
| 1002-10-8RC* | 12.40 | 314.96 | 8.50 | 215.90 | 5.90 | 149.86 |
| 1002-1010RC* | 12.40 | 314.96 | 10.75 | 273.05 | 5.90 | 149.86 |
| 1002-1010WCRC | 12.40 | 314.96 | 10.75 | 273.05 | 5.90 | 149.86 |
| 1002-1210RC* | 14.51 | 368.55 | 12.60 | 320.04 | 6.38 | 162.05 |
| 1002-1212RC* | 14.51 | 368.55 | 12.60 | 320.04 | 6.38 | 162.05 |
| 1002-1212WCRC | 15.25 | 387.35 | 12.6 | 320.04 | 6.42 | 163.07 |
| 1002-1215RC* | 15.25 | 387.35 | 14.38 | 365.25 | 6.42 | 163.07 |
| 1002-1515RC* | 18.14 | 461.76 | 15.40 | 391.16 | 9.89 | 251.27 |
| 1002-1818RC* | 21.90 | 556.26 | 19.00 | 482.60 | 9.63 | 244.60 |
| 1002-2121RC* | 25.46 | 646.68 | 22.30 | 566.42 | 9.89 | 251.21 |
| 1002-2424RC* | 28.97 | 735.84 | 25.00 | 635.00 | 9.89 | 251.21 |
* Supplied with reducer.
Maximum Test Pressure: 4.3 PSI (29.6 KPA)
Maximum Operating Temperature: 140° F non-consistent
| Part No. | Side A (in) | Side A (mm) | Side B (in) | Side B (mm) | Width C (in) | Width C (mm) |
|---|---|---|---|---|---|---|
| 1003-44RC | 5.41 | 137.41 | 4.94 | 125.48 | 4.07 | 103.38 |
| 1003-66RC | 7.25 | 184.15 | 6.84 | 173.74 | 5.93 | 150.62 |
| 1003-66WCRC | 8.00 | 203.20 | 6.90 | 175.26 | 6.00 | 152.40 |
| 1003-68RC* | 9.05 | 229.87 | 7.20 | 182.88 | 5.98 | 151.89 |
| 1003-8-10RC* | 11.22 | 284.99 | 9.65 | 245.11 | 5.97 | 151.51 |
| 1003-88RC | 9.75 | 247.65 | 9.06 | 230.12 | 5.94 | 150.88 |
| 1003-1010RC* | 12.40 | 314.96 | 11.12 | 282.45 | 5.90 | 149.86 |
| 1003-1212RC* | 14.51 | 368.55 | 13.20 | 335.28 | 6.38 | 162.05 |
| 1003-1818RC* | 21.90 | 556.26 | 19.50 | 495.30 | 9.63 | 244.63 |
* Supplied with reducer.
Maximum Test Pressure: 4.3 PSI (29.6 KPA)
Maximum Operating Temperature: 140° F non-consistent
| Part No. | Side A (in) | Side A (mm) | Side B (in) | Side B (mm) | Width C (in) | Width C (mm) |
|---|---|---|---|---|---|---|
| 1004-44RC | 5.51 | 139.95 | 5.51 | 139.95 | 3.97 | 100.84 |
| 1004-66RC | 7.58 | 192.53 | 7.58 | 192.53 | 5.94 | 150.88 |
| 1004-88RC | 10.38 | 263.65 | 10.38 | 263.65 | 5.90 | 149.86 |
| 1004-1010RC | 12.40 | 314.96 | 12.40 | 314.96 | 5.90 | 149.86 |
| 1004-1212RC | 15.25 | 387.35 | 15.25 | 387.35 | 6.42 | 163.07 |
| 1004-1515RC | 19.74 | 501.40 | 19.74 | 501.40 | 9.89 | 251.21 |
* Supplied with reducer.
Maximum Test Pressure: 4.3 PSI (29.6 KPA)
Maximum Operating Temperature: 140° F non-consistent
| Part No. | Side A (in) | Side A (mm) | Side B (in) | Side B (mm) | Width C (in) | Width C (mm) |
|---|---|---|---|---|---|---|
| 1006-44RC* | 5.51 | 139.95 | 4.50 | 114.3 | 3.97 | 100.84 |
| 1006-64RC* | 7.58 | 192.53 | 4.38 | 111.25 | 5.94 | 150.88 |
| 1006-66RC* | 7.58 | 192.53 | 6.63 | 168.28 | 5.94 | 150.88 |
| 1006-86RC* | 10.38 | 263.65 | 6.38 | 162.05 | 5.90 | 149.86 |
| 1006-88RC* | 10.38 | 263.65 | 8.50 | 215.90 | 5.90 | 149.86 |
| 1006-10-8RC* | 12.4 | 314.96 | 8.38 | 212.85 | 5.9 | 149.86 |
| 1006-1010RC* | 12.40 | 314.96 | 10.75 | 273.05 | 5.90 | 149.86 |
| 1006-1210RC* | 15.25 | 387.35 | 10.6 | 269.24 | 6.42 | 163.07 |
| 1006-1212RC* | 15.25 | 387.35 | 12.60 | 320.04 | 6.42 | 163.07 |
| 1006-1515RC* | 19.74 | 501.40 | 15.40 | 391.16 | 9.89 | 251.28 |
* Supplied with reducer.
Maximum Test Pressure: 4.3 PSI (29.6 KPA)
Maximum Operating Temperature: 140° F non-consistent
| Part No. | Side A (in) | Side A (mm) | Side B (in) | Side B (mm) | Width C (in) | Width C (mm) |
|---|---|---|---|---|---|---|
| 1051-44RC | 4.80 | 121.92 | 4.39 | 111.51 | 3.94 | 100.08 |
| 1051-45RC* | 5.00 | 127.00 | 5.52 | 140.21 | 3.97 | 100.84 |
| 1051-46RC* | 4.75 | 120.65 | 6.60 | 167.64 | 5.74 | 145.80 |
| 1051-55RC* | 5.90 | 149.86 | 5.50 | 139.70 | 5.92 | 150.37 |
| 1051-64RC* | 6.95 | 176.53 | 4.38 | 111.25 | 5.92 | 150.37 |
| 1051-65RC* | 6.95 | 176.53 | 5.50 | 139.70 | 5.92 | 150.37 |
| 1051-66RC | 6.95 | 177 | 6.60 | 168 | 6.0 | 152 |
| 1051-86RC* | 9.05 | 229.87 | 6.38 | 162.05 | 5.89 | 149.61 |
| 1051-8-10RC* | 10.63 | 270.00 | 9.05 | 229.87 | 5.89 | 149.61 |
| 1051-88RC | 9.25 | 234.95 | 8.51 | 216.15 | 5.97 | 151.51 |
| 1051-10-8RC* | 11.02 | 279.91 | 8.38 | 212.85 | 5.97 | 151.51 |
| 1051-1210RC* | 13.30 | 337.82 | 10.60 | 269.24 | 5.97 | 151.51 |
| 1051-1212RC* | 13.37 | 339.60 | 12.60 | 320.04 | 5.97 | 151.51 |
| 1051-1818RC | 19.74 | 501.27 | 19.74 | 501.40 | 9.89 | 251.28 |
* Supplied with reducer.
Maximum Test Pressure: 4.3 PSI (29.6 KPA)
Maximum Operating Temperature: 140° F non-consistent
| Part No. | Side A (in) | Side A (mm) | Side B (in) | Side B (mm) | Width C (in) | Width C (mm) |
|---|---|---|---|---|---|---|
| 1055-44RC | 4.75 | 120.65 | 4.75 | 120.65 | 3.96 | 100.58 |
| 1055-66RC | 6.65 | 168.91 | 6.65 | 168.91 | 5.92 | 150.37 |
| 1055-88RC | 9.05 | 229.87 | 9.05 | 229.87 | 5.98 | 151.89 |
| 1055-1010RC | 11.22 | 284.99 | 11.22 | 284.99 | 5.97 | 151.51 |
| 1055-1212RC | 13.37 | 339.60 | 13.37 | 339.60 | 5.97 | 151.64 |
* Supplied with reducer.
Maximum Test Pressure: 4.3 PSI (29.6 KPA)
Maximum Operating Temperature: 140° F non-consistent
| Part No. | Side A (in) | Side A (mm) | Side B (in) | Side B (mm) | Width C (in) | Width C (mm) |
|---|---|---|---|---|---|---|
| 1056-150RC | 1.94 | 49.28 | 1.94 | 49.28 | 3.43 | 87.12 |
| 1056-22RC | 2.41 | 61.21 | 2.41 | 61.21 | 3.45 | 87.63 |
| 1056-32RC* | 3.52 | 89.41 | 2.38 | 60.45 | 3.96 | 100.58 |
| 1056-33RC | 3.46 | 87.88 | 3.46 | 87.88 | 3.98 | 101.09 |
| 1056-43RC* | 4.58 | 116.33 | 3.38 | 85.85 | 4.02 | 102.11 |
| 1056-44RC | 4.58 | 116.33 | 4.58 | 116.33 | 4.02 | 102.11 |
| 1056-54RC* | 5.52 | 140.21 | 4.38 | 111.25 | 3.97 | 100.84 |
| 1056-55RC | 5.52 | 140.21 | 5.52 | 140.21 | 3.97 | 100.84 |
| 1056-64RC* | 6.60 | 167.64 | 4.50 | 114.30 | 5.74 | 145.80 |
| 1056-65RC* | 6.60 | 167.64 | 5.62 | 142.75 | 5.74 | 145.80 |
| 1056-66RC | 6.60 | 167.64 | 6.60 | 167.64 | 5.74 | 145.80 |
| 1056-86RC* | 8.64 | 219.46 | 6.38 | 162.05 | 6.04 | 153.42 |
| 1056-88RC | 8.64 | 219.46 | 8.64 | 219.46 | 6.04 | 153.42 |
| 1056-1010RC | 10.63 | 270.00 | 10.63 | 270.00 | 5.89 | 149.61 |
| 1056-1212RC | 12.52 | 318.01 | 12.52 | 318.01 | 6.32 | 160.53 |
| 1056-1515RC | 15.92 | 404.37 | 15.92 | 404.37 | 9.89 | 251.21 |
| 1056-1818RC | 19.10 | 485.14 | 19.10 | 485.14 | 9.89 | 251.21 |
* Supplied with reducer.
Maximum Test Pressure: 4.3 PSI (29.6 KPA)
Maximum Operating Temperature: 140° F non-consistent