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Black flexible elastomeric PVC coupling with stainless steel clamps, reducing 4 inch to 3 inch pipe connection

Fernco Inc.

Fernco Inc. 1056-43 Flexible Coupling trap

SKU CH-VW66-37PQP

Flexible PVC coupling connects 4 in and 3 in pipes with a watertight seal

  • TypeDrain Components
  • MaterialElastomeric PVC
  • Reduces pipe size from 4" to 3
  • Elastomeric PVC resists corrosion and vibration
  • Flexible design simplifies installation in tight spaces
  • 4" overall length fits standard drain layouts

Fernco 1056-43 Flexible Reducing Coupling

This elastomeric PVC coupling connects 4-inch and 3-inch nominal pipe sizes in drainage systems. It provides a watertight seal between dissimilar pipe diameters without rigid fittings. The flexible body accommodates slight misalignment and ground movement. Suitable for residential and light commercial plumbing repairs.

Check pipe material and nominal sizes before

Verify that both pipe ends match the 4-inch and 3-inch nominal dimensions listed. Confirm the existing pipes are compatible with elastomeric PVC couplings. Ensure adequate access to slide the coupling over both pipe ends during installation. This coupling is not designed for pressurised water supply lines.

Highlights

  • Reduces pipe size from 4" to 3
  • Elastomeric PVC resists corrosion and vibration
  • Flexible design simplifies installation in tight spaces
  • 4" overall length fits standard drain layouts

Specifications

TypeDrain Components
MaterialElastomeric PVC
BrandFernco

Questions about this item

Does the 1056-43 flexible coupling include pipe clamps or do I need to buy them separately?

The 1056-43 coupling is supplied as the elastomeric PVC body only; stainless-steel hose clamps must be purchased separately to secure the connection.

Should I choose the 1056-43 for a 4-inch to 3-inch PVC transition or is another model needed?

The 1056-43 is designed for a nominal 4-inch to 3-inch PVC pipe reduction, with female ends measuring 4 7/16 in and 3 1/2 in outside diameter respectively.

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