Fernco Inc P1056-64 Flexible Reducing Coupling 6x4

Product Description

The FERNCO INC P1056-64 is a flexible reducing coupling designed to join 6-inch pipe to 4-inch pipe in drain, waste, and vent (DWV) piping systems. The coupling uses a shear-ring design with two stainless steel clamps to create a secure, leak-resistant connection between dissimilar or same-material pipes. It accommodates cast iron to cast iron, cast iron to plastic, and plastic to plastic transitions without special tools or solvent welding. Licensed plumbers and pipefitters install this coupling in residential and light commercial drain line repairs, new construction tie-ins, and underground piping transitions where rigid fittings are impractical.

The P1056-64 is suited for 6-inch to 4-inch reducing connections in sanitary drain, waste, and vent applications. It is commonly installed at pipe transitions where material changes occur, such as connecting older cast iron drain lines to PVC or ABS plastic piping. The flexible body absorbs minor pipe misalignment and vibration, making it a practical choice for tight spaces, trench work, and retrofit installations where rigid fittings cannot be easily maneuvered into position.

Key Features

• Reduces 6-inch pipe to 4-inch pipe in a single fitting
• Compatible with cast iron and plastic pipe materials on both ends
• Includes two stainless steel clamps for secure, corrosion-resistant clamping
• Flexible body accommodates minor misalignment and vibration
• No solvent welding, heat, or special tooling required for installation

Compatibility

Connects cast iron or plastic pipe to cast iron or plastic pipe in 6-inch to 4-inch reducing configurations. Suitable for DWV piping systems using PVC, ABS, or cast iron materials.

Installation Notes

Installation is typically performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local codes. Before servicing an existing drain line, shut off the water supply and ensure the line is drained and depressurized. Position the coupling over the pipe ends, center the fitting, and tighten the stainless steel clamps evenly using a screwdriver or nut driver to the clamp manufacturer's recommended procedure. Do not overtighten clamps, as this can distort the coupling body and compromise the seal.

Technical Specifications

• Pipe Size (Inlet): 6 inches
• Pipe Size (Outlet): 4 inches
• Clamp Material: Stainless Steel
• Clamp Quantity: 2
• Weight: 22 pounds
• Unit of Measure: EA
• Package Quantity: 10

Standard Information

• Brand: FERNCO INC
• Manufacturer Part Number: P1056-64