Fit Check (Return Reducer): Flexible 3 in DWV coupling—designed to connect pipes within the specified outside diameter range (3.10" - 3.70") ; always measure OD before ordering Unshielded Flexible Repair Coupler: Ideal for drain, waste, and vent (DWV) systems—not rated for pressure applications CONNECT VARIOUS PIPE TYPES: The Fernco 1056-33 coupling connects Plastic (PVC, ABS, CPVC, Smooth Wall HDPE), Cast Iron, Copper, Steel or Lead Pipe for a watertight joint. For sewer and drain, waste and vent piping. NO-MESS INSTALLATION: Fernco couplings are easy to install without the hassle of messy primers, glues and their unwanted odors. SPECS & CODES: Conforms to ASTM D 5926, C 1173 CSA B602 and UPC Approved. 300 stainless steel clamps are corrosion-resistant, rustproof and make installing quick and easy with just a screwdriver, nut driver or torque wrench. The Fernco 1056-33 flexible coupling is designed for fast, reliable DWV pipe connections and repairs without the need for special tools or adhesives. Its unshielded, slip-on design makes it ideal for connecting or repairing 3-inch drain, waste, and vent piping in tight or difficult locations. Constructed from durable elastomeric PVC, the coupling flexes to accommodate minor pipe misalignment while maintaining a secure seal. Stainless steel worm-gear clamps provide even compression for dependable performance across compatible pipe materials, including PVC, ABS, cast iron, steel, and CPVC. Before you buy: This coupling is intended for DWV and sewer applications only and is not pressure rated. Always measure the outside diameter (OD) of your pipe to confirm proper fit and verify local code requirements for shielded vs unshielded couplings. A trusted solution for plumbers, contractors, and DIY repairs, the Fernco 1056-33 delivers fast installation and dependable results where flexibility matters most.