✓ .012″ stainless steel shear ring — resists heavy earth loads and shear forces ✓ Molded-in bushing holds rigid pipe alignment on buried joints ✓ 301 stainless housing & band, 305 stainless screws — corrosion resistant ✓ ASTM C1173 & CSA B602, ICC ES PMG & UPC listed — passes inspection High Demand Item – Frequently Reordered by Contractors The Fernco 1056RC Strong Back is the shielded, heavy-duty version of the standard 1056 coupling — built for underground connections that have to stand up to heavy earth loads and shear. A .012″ stainless steel shear ring wraps the elastomeric PVC sleeve and a molded-in bushing keeps the two pipes rigidly aligned, so the joint holds its shape instead of flexing under load. It connects cast iron, plastic, and steel in the same or different sizes, with no primers or glue. The clamp housing and band are 301 stainless steel with 305 stainless screws. Spec the standard 1056 for everyday DWV work; spec the 1056RC when the joint is buried, carries load, or needs the extra alignment the steel shield provides. Stocked 1-1/2″ through 15″. Applications Underground sewer and drain connections under heavy earth loads Joints that must resist shear forces and hold pipe alignment Transitioning cast iron, plastic, or steel of the same or different sizes Repairs and tie-ins where a standard band coupling isn’t rigid enough DWV, sewer, and drain work that needs added strength and support Key Features .012″ thick 300-series stainless steel shear ring Molded-in bushing for improved pipe alignment Elastomeric PVC sleeve — Shore A 65, leak-proof, chemical and sewer-gas resistant 301 stainless clamp housing and band; 305 stainless clamp screw Connects same or different pipe sizes and materials Made in the USA — sizes 15″ and below are AIS and BABA compliant Specifications Sleeve Material Elastomeric PVC, Shore A 65 ±5 Shear Ring .012″ thick, 300-series stainless steel Clamp Housing & Band 301 stainless steel Clamp Screw 305 stainless steel Standards ASTM C1173, CSA B602, ASTM D5926 (gasket); ICC ES PMG & UPC listed Installation Torque 60 in-lbs Max Test Pressure 4.3 PSI (29.6 kPa) Operating Temperature -30°F to 140°F (non-consistent) Origin Made in USA (15″ and below AIS/BABA compliant) Sizes & Dimensions Part No. Size Body Dia. A Body Dia. B Width Price 1056-150RC 1-1/2" 1.94″ 1.94″ 3.43″ $21.65 1056-22RC 2" 2.41″ 2.41″ 3.45″ $22.24 1056-33RC 3" 3.46″ 3.46″ 3.98″ $28.90 1056-44RC 4" 4.58″ 4.58″ 4.02″ $36.79 1056-66RC 6" 6.60″ 6.60″ 5.74″ $70.07 1056-64RC 6" x 4" 6.60″ 4.50″ 5.74″ $90.62 1056-88RC 8" 8.64″ 8.64″ 6.04″ $104.01 1056-1010RC 10" 10.63″ 10.63″ 5.89″ $135.31 1056-1212RC 12" 12.52″ 12.52″ 6.32″ $165.63 1056-1515RC 15" 15.92″ 15.92″ 9.89″ $283.03 Best Used For Buried sewer and drain joints under heavy backfill or traffic load Connections that need to resist shear and stay aligned Material and size transitions where the standard 1056 needs reinforcing Permanent underground repairs built to last the life of the line FAQ How is this different from the standard 1056? The 1056RC adds a .012″ stainless steel shear ring and molded-in bushing over the same PVC sleeve. That shield resists heavy earth loads and shear and keeps the joint rigid — the standard 1056 is an unshielded band coupling for lighter-duty work. What pipe materials does it connect? Cast iron, plastic, and steel, in the same or different sizes. Reducing sizes are listed large × small (for example, 6″ x 4″). Is it rated for underground use? Yes — it’s engineered for demanding underground applications and conforms to ASTM C1173 and CSA B602, with ICC ES PMG and UPC listings. How do I install it? Slip it over the pipe ends and torque the stainless clamps to 60 in-lbs with a nut driver or torque wrench. No primer, glue, or cure time. Why Contractors Choose This Steel shield means fewer callbacks on buried, load-bearing joints Holds alignment where a plain band coupling would sag or shear One fitting transitions material and size at the same time Code-listed: ASTM C1173, CSA B602, ICC ES PMG, UPC Made in the USA ✓ .012″ 300-series stainless steel shear ring ✓ 301 stainless housing & band, 305 stainless screws ✓ ASTM C1173, CSA B602, ICC ES PMG & UPC listed ✓ Made in the USA (15″ and below AIS/BABA compliant) Documents Strong Back RC Specs & Dimensional Drawings Buy More. Save More. Stocking the truck or buying for a job? Call 615-291-9103 or email [email protected] for job-lot and volume pricing.
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