Fernco 1056-22 2-in. Flexible PVC Pipe Coupling for Cast Iron and Plastic

The Fernco 1056-22 Flexible Pipe Coupling provides a straightforward way to join sewer, drain, waste, and vent piping without dealing with adhesives. Designed to fit pipes with an outside diameter between 2.15 inches and 2.50 inches, it is a practical fitting for homeowners and plumbers connecting different piping materials in tight or tricky configurations.

Constructed from elastomeric polyvinyl chloride, the coupling delivers a watertight seal that resists sewer gases and chemical degradation. It bridges connections across plastic (PVC, ABS, CPVC, and smooth wall HDPE), cast iron, copper, steel, and lead. This material flexibility makes it handy when repairing older plumbing infrastructure or tying modern plastic lines into existing metal stacks.

Installation is clean and requires no messy glues, solvent primers, or unpleasant fumes. The fitting secures firmly in place using corrosion-resistant 300 stainless steel clamps, which tighten down using a standard screwdriver, nut driver, or torque wrench. It also carries broad code compliance, conforming to ASTM D 5926, ASTM C 1173, and CSA B602 standards alongside UPC approval.

Because the coupling relies on a specific internal diameter of 2.41 inches, precise sizing is critical. It will only seal properly on pipes with an outside diameter falling strictly within the 2.15-inch to 2.50-inch range, meaning careful measurement of the target pipe is necessary before installation.

Verdict: The Fernco 1056-22 is an excellent choice for anyone tackling drain, waste, and vent repairs across mixed pipe materials. If your pipe dimensions match the specified diameter range, it offers a durable, code-approved seal with minimal installation hassle.

• Model: 1056-22 (1056-22W)
• Material: Elastomeric Polyvinyl Chloride (PVC)
• Clamp Material: 300 Stainless Steel
• Internal Diameter: 2.41 inches
• Compatible Pipe Outside Diameter: 2.15 inches - 2.50 inches
• Pipe Material Compatibility: Plastic (PVC, ABS, CPVC, Smooth Wall HDPE), Cast Iron, Copper, Steel, Lead
• Applications: Sewer and drain, waste and vent (DWV) piping
• Certifications: ASTM D 5926, ASTM C 1173, CSA B602, UPC Approved
• Design Life: 50-year service life

A great fit if you:

• Need to connect two different pipe materials, such as cast iron to PVC or copper to steel.
• Want to fix drain, waste, or vent lines without dealing with smelly primers and glues.
• Have pipes with an outside diameter measured between 2.15 inches and 2.50 inches.
• Require code-certified fittings that meet ASTM, CSA, and UPC standards.

Consider something else if you:

• Are working on pipes with outside diameters smaller than 2.15 inches or larger than 2.50 inches.
• Need a coupling for applications other than sewer, drain, waste, and vent lines.

What pipe materials can this coupling connect?
It connects plastic (including PVC, ABS, CPVC, and smooth wall HDPE), cast iron, copper, steel, and lead pipes.

What tools are needed for installation?
You can install the stainless steel clamps using a screwdriver, nut driver, or torque wrench without any glue or primer.

How do I ensure this coupling fits my pipe?
Measure the outside diameter (OD) of your pipe. This coupling has a 2.41-inch internal diameter and fits pipes with an OD between 2.15 inches and 2.50 inches.

Which plumbing standards does this fitting meet?
It conforms to ASTM D 5926, ASTM C 1173, and CSA B602, and is UPC approved.