Fernco 1056-125 1 Flexible Pvc Clamp Coupling 1-1/4 in

Product Description

The FERNCO 1056-125 1 is a flexible PVC clamp coupling designed to create a leak-proof transition between 1-1/4 inch cast iron and plastic pipe. This coupling uses a compressible PVC sleeve and integral stainless steel clamps to form a tight, watertight seal without the need for solvent cement or special tools. Licensed plumbers and drain technicians install these couplings on drain, waste, and vent systems during repair or retrofit work. The coupling accommodates minor variations in outside diameter, making it suitable for connecting dissimilar pipe materials in existing systems where rigid fittings are not practical.

This coupling is intended for use in residential and light commercial plumbing applications, primarily on drain, waste, and vent lines. It is commonly installed when transitioning from older cast iron drain stacks or branch lines to PVC or ABS plastic pipe, a situation frequently encountered during bathroom remodels, drain repairs, and partial re-pipe projects. Each coupling is clearly marked with the part number, nominal size, and compatible pipe materials to help confirm the correct fitting is being installed before work begins.

Key Features

• Flexible PVC sleeve creates a leak-proof seal across dissimilar pipe materials
• Sized for 1-1/4 inch cast iron to plastic pipe transitions
• Integral stainless steel clamps provide secure mechanical connection
• No solvent cement required — installs with a standard screwdriver or nut driver
• Part number, size, and compatible pipe materials molded and marked on coupling body
• Dimensional flexibility accommodates minor outside diameter variation between pipe types

Compatibility

Designed for connecting 1-1/4 inch cast iron pipe to plastic pipe on drain, waste, and vent systems. Compatible with PVC and ABS plastic pipe at the same nominal size.

Installation Notes

Installation is performed by a licensed plumber in accordance with applicable IPC or local plumbing code requirements. Before installing, shut off any upstream flow and ensure both pipe ends are clean, deburred, and free of sharp edges that could cut the PVC sleeve. Slide the coupling onto one pipe end, align with the mating pipe, and tighten the stainless steel clamp bands evenly to the fitting manufacturer specifications. Do not overtighten clamps, as excessive torque can distort the sleeve and compromise the seal.

Technical Specifications

• Pipe Size: 1-1/4 inches
• Connection Type: Cast iron to plastic
• Sleeve Material: Flexible PVC
• Case Pack Quantity: 40 units
• Overall Case Dimensions: 11.25 inches x 8.00 inches x 10.125 inches

Standard Information

• Brand: FERNCO
• Manufacturer Part Number: 1056-125 1