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White PVC flexible reducing coupling with slip-on ends

Fernco Inc.

Fernco Inc. 1056-84 FlexStraight PVC 8in 4in slip-on trap

SKU CH-XMCF-QDD3J MPN 1056-84

A flexible PVC reducing coupling joining 8-inch and 4-inch pipes with slip-on connections

  • Product typeDrain Components
  • Flexible PVC coupling joins 8-inch and 4-inch pipes
  • Slip-on design speeds installation without special tools
  • Reducing configuration connects mismatched drain sizes
  • Durable PVC construction resists corrosion and chemicals
  • Suitable for residential and commercial drainage systems

What this fitting does

The Fernco 1056-84 FlexStraight is a flexible PVC reducing coupling that joins an 8-inch nominal pipe to a 4-inch nominal pipe using slip-on female connections. It is designed for drainage systems where a straight, watertight transition between two different pipe diameters is required.

When to choose this coupling

Use this coupling when you need to connect 8-inch and 4-inch PVC drain lines without rigid fittings or solvent welding. The flexible body absorbs minor misalignment and ground movement, making the jump worthwhile on retrofit jobs or where pipe settlement is expected.

How it fits the system

The coupling slides over the outside of each pipe and seals with stainless-steel clamps, so no primer or cement is needed. It requires 6 inches of straight pipe engagement on each side and frees the installer from precise alignment while maintaining a secure, leak-resistant joint.

How it compares

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

Price $52.99
Pricier than about 63% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameFernco
Model name1056-84
Product typeDrain Components

Questions about this item

What pipe diameters does the 1056-84 FlexStraight connect?

The coupling joins an 8 in nominal PVC pipe to a 4 in nominal PVC pipe using slip-on female ends on both sides.

How do I install the FlexStraight reducing coupling and what step is often missed?

Slide each pipe into the flexible PVC sleeve, then tighten the stainless steel clamps evenly; the step often missed is checking that both pipes are fully seated before final clamp torque.

What maintenance or replacement will the 1056-84 need over time?

Inspect the flexible PVC body and clamps periodically for cracks, hardening or corrosion; replace the coupling if the sleeve shows deterioration or the clamps no longer seal.

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