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Black flexible PVC coupling with ribbed ends for three-inch pipe

Fernco Inc.

Fernco Inc. 1056-33 Flexible Coupling 3 in trap

SKU CH-HXNR-AA4PK

Elastomeric PVC flexible coupling joins 3-inch nominal pipe sizes in drainage systems

  • TypeDrain Components
  • MaterialElastomeric PVC
  • Elastomeric PVC resists corrosion and chemicals
  • Flexible design absorbs vibration and ground movement
  • Fits 3 in nominal pipe on both ends
  • Four-inch overall length bridges gaps easily
  • Fernco brand trusted by plumbing professionals

Product Purpose

The Fernco 1056-33 flexible coupling joins two 3-inch pipes in drainage systems. It is intended for plumbers and maintenance crews who need a watertight, corrosion-resistant seal between identical pipe diameters. The elastomeric PVC construction handles typical waste-flow conditions without requiring rigid alignment.

Practical Limits

The coupling fits nominal 3-inch pipe with a 3 7/16-inch and 4 1/4-inch dimensional range on each end. It provides a 4-inch overall length for the connection. The elastomeric PVC material resists common sewage chemicals but is not rated for pressure piping or high-temperature service beyond standard drain temperatures.

Upgrade Context

This coupling replaces rigid glue or threaded joints where ground movement, vibration, or misalignment would cause leaks. The jump is worthwhile when a flexible, tool-free seal speeds installation or accommodates settlement that would crack solid fittings. It does not suit applications needing rigid structural support or pressure-rated containment.

Highlights

  • Elastomeric PVC resists corrosion and chemicals
  • Flexible design absorbs vibration and ground movement
  • Fits 3 in nominal pipe on both ends
  • Four-inch overall length bridges gaps easily
  • Fernco brand trusted by plumbing professionals

Specifications

TypeDrain Components
MaterialElastomeric PVC
BrandFernco

Questions about this item

Should I choose the 1056-33 coupling for a 3-inch pipe repair?

The 1056-33 is designed for nominal 3-inch pipe size with female ends on both sides, making it the correct choice for joining two 3-inch pipes.

How does the 4-inch overall length affect installation in a tight trap assembly?

The 4-inch overall length provides a compact connection that fits within standard trap configurations while allowing enough surface area for the stainless steel clamps to seal properly.

What pipe standard does the elastomeric PVC coupling conform to for drain applications?

The flexible coupling conforms to standard drain pipe dimensions for 3-inch nominal size, using elastomeric PVC to create a watertight seal on DWV systems without requiring solvent welding.

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