Fernco Inc P1002-43 Flexible Reducing Coupling 4x3 Inch

Product Description

The FERNCO INC P1002-43 is a flexible reducing coupling designed to join dissimilar pipe materials in drain, waste, and vent applications. It connects 4-inch clay pipe to 3-inch plastic or cast iron pipe using a flexible sleeve secured by two stainless steel clamps. The flexible construction compensates for minor misalignment and pipe-end irregularities common in repair and retrofit scenarios. Licensed plumbers and experienced pipe installers use this coupling when transitioning between legacy clay sewer lines and modern PVC or ABS runs, or when connecting to existing cast iron drain piping.

This coupling is suited for residential and light commercial plumbing repair work, particularly in older properties where clay tile sewer laterals are still in service. It performs in below-grade and at-grade installations and handles the pipe-size reduction from 4 inches to 3 inches in a single fitting. Typical use cases include sewer lateral repairs, building drain transitions, and service replacements where full pipe replacement is not practical.

Key Features

• Reduces 4-inch pipe to 3-inch pipe in one fitting
• Flexible sleeve accommodates minor misalignment and pipe-end irregularities
• Two stainless steel clamps included for secure, corrosion-resistant connection
• Joins clay pipe to plastic (PVC, ABS) or cast iron pipe
• No special tools required beyond a standard clamp screwdriver or nut driver

Compatibility

Designed to connect 4-inch clay pipe to 3-inch plastic or cast iron pipe as stated by the manufacturer. Suitable for drain, waste, and vent piping transitions in residential and light commercial systems.

Installation Notes

Installation is typically performed by a licensed plumber working on drain, waste, or vent systems. Before installing, shut off any active flow and ensure pipe ends are clean, deburred, and free of sharp edges that could damage the flexible sleeve. Slide the coupling over the pipe ends, confirm full seating of both pipes into the sleeve, and tighten the stainless steel clamps evenly. Work must comply with applicable local plumbing codes and IPC standards for drain and sewer connections.

Technical Specifications

• Pipe Connection Size (Inlet): 4 inches
• Pipe Connection Size (Outlet): 3 inches
• Clamps Included: 2 stainless steel clamps
• Compatible Pipe Materials: Clay, Plastic (PVC, ABS), Cast Iron
• Weight: 40 pounds
• Unit of Measure: EA
• Package Quantity: 20

Standard Information

• Brand: FERNCO INC
• Manufacturer Part Number: P1002-43