We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black flexible rubber reducing coupling with two different sized ends and stainless steel clamps

Fernco Inc.

Fernco Inc. 1056-415 Flexible Reducing Coupling trap

SKU CH-S13X-NVT4G MPN 1056-415

Flexible reducing coupling connects 4-inch and 1½-inch nominal pipe sizes

  • Product typeDrain Components
  • Main materialHAWA
  • Flexible reducing coupling joins 4 in and 1-1/2 in pipes
  • Black finish suits standard plumbing installations
  • Fernco 1056-415 model ensures reliable drain connections
  • Female ends on both sides simplify pipe assembly
  • New condition guarantees unused, factory-fresh performance

Application Scope

The Fernco 1056-415 is a flexible reducing coupling designed to join nominal pipe sizes of 1-1/2 inch and 4 inch. It suits plumbers and maintenance teams needing a reliable transition between dissimilar drain diameters in PVC systems. The HAWA material construction provides the elasticity required for a watertight seal on residential and light commercial waste lines.

Upgrade Context

This coupling replaces rigid glue joints or mismatched bushings that cannot accommodate ground movement or vibration. The jump is worth it when installing repairs in existing lines where alignment is imperfect or when future settlement is expected. It eliminates the need for precise pipe cutting and solvent welding in tight access areas.

Sustained Behaviour

Under continuous drainage flow the flexible body absorbs hydraulic shock and thermal expansion without cracking or leaking. The clamp bands maintain constant compression on the pipe ends, preventing seal relaxation over time. The material resists common household chemicals found in waste water, ensuring long-term performance in daily service.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $6.99
Cheaper than about 90% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameFernco
Model name1056-415
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

Will the 1056-415 coupling fit a 4 in pipe and a 1 1/2 in pipe?

The coupling is designed for nominal pipe sizes of 4 in and 1 1/2 in, with female ends sized at 4 3/8 in to 5 in and 1 7/8 in to 2 1/2 in respectively.

How do I install the 1056-415 coupling and what step is often missed?

Slide the coupling over each pipe end, then tighten the stainless steel clamps evenly with a torque wrench to the specified inch-pounds; the step often missed is verifying clamp torque after the first water test.

What maintenance will the 1056-415 coupling need over time?

Inspect the flexible body and clamps annually for cracks, corrosion or loosening; replace the coupling if the elastomer hardens or the clamps can no longer hold a seal.

More in Drain Stoppers, Strainers & Traps

Similar items