Fernco Inc P1056-315 Flexible Reducing Coupling

Product Description

The FERNCO INC P1056-315 is a flexible reducing coupling designed to connect 3-inch pipe to 1.5-inch pipe in drain, waste, and vent (DWV) plumbing systems. It ships with two stainless steel clamps that compress a flexible elastomeric sleeve to form a leak-resistant seal between dissimilar or same-material pipe ends. Licensed plumbers and pipe fitters use this coupling for repair and retrofit work where rigid connections are impractical or where pipe misalignment exists. The coupling accommodates both cast iron and plastic pipe on either end, making it a versatile choice for transition joints in residential and light commercial plumbing.

This coupling is used in DWV piping applications where a 3-inch line reduces to a 1.5-inch line, such as branch connections at lavatories, utility sinks, or washing machine standpipes. It is well suited for underground, in-wall, and exposed drain line repairs where removing and re-cutting pipe is not practical. The flexible design allows for minor angular deflection and pipe offset, which is common in older cast iron systems and mixed-material installations.

Key Features

• Reduces 3-inch pipe to 1.5-inch pipe in a single fitting
• Connects cast iron to cast iron, plastic to plastic, or cast iron to plastic
• Includes two stainless steel clamps for secure, corrosion-resistant clamping
• Flexible elastomeric sleeve absorbs vibration and accommodates minor misalignment
• No special tools required for installation — standard clamp driver applies

Compatibility

Designed as an OEM-style flexible coupling for DWV piping transitions between 3-inch and 1.5-inch cast iron or plastic pipe ends in residential and commercial drain, waste, and vent systems.

Installation Notes

Installation is performed by a licensed plumber in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off water flow and drain the affected line before beginning work. Clean and deburr pipe ends so the sleeve seats evenly, and torque clamps uniformly to avoid sleeve distortion. Do not use this coupling on pressurized supply lines — it is rated for gravity-flow DWV service only.

Technical Specifications

• Inlet Size: 3 inches
• Outlet Size: 1.5 inches
• Clamp Material: Stainless Steel
• Clamps Included: 2
• Weight: 7 pounds
• Unit of Measure: EA
• Package Quantity: 10

Standard Information

• Brand: FERNCO INC
• Manufacturer Part Number: P1056-315