Fernco XJ-4 Expansion Joint — 4" Flexible DWV Expansion Coupling for Vertical Drain & Vent Systems

Expansion Joints · Flexible Expansion Joint

Fernco XJ-4 Expansion Joint — 4" Flexible DWV Expansion Coupling for Vertical Drain & Vent Systems

Part # XJ-4

One-piece design. Engineered with a single-piece construction and internal stops, eliminating mechanical failure points and ensuring...
Simplifies installation. Installs quickly with standard tools and no complex assemblies, offering a more efficient alternative to traditional...
Maintenance-free performance. No moving components to wear out or fail, delivering long-term reliability without the need for ongoing maintenance.
Recommended use. Rated for above ground use

Expansion Joints Size: 4" x 4"

Connects Cast Iron, Plastic and Steel to Cast Iron, Plastic and Steel

Drawing (PDF) All documents

Dimensions

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End 1 pipe OD range	4.10" to 4.40"
End 2 pipe OD range	4.10" to 4.40"
End 1 inside diameter	4.40"
Length	5.50 in
Width	5.63 in
Height	4.05 in
Weight	0.82 lb

Product details

The XJ-4 expansion joint is designed for 4" vertical drain, waste, and vent systems, providing a durable solution for managing pipe movement caused by temperature fluctuations. Built with a one-piece elastomeric body and stainless steel clamps, it delivers dependable performance in demanding commercial and multi-story building applications while reducing the need for complex offset installations.

Manages thermal pipe movement. Accommodates up to 1-1/2" of expansion and 1/2" of contraction, protecting piping systems from stress caused by temperature changes.

Ideal for vertical DWV systems. Specifically designed for above-ground vertical stacks, including drain, waste, vent, and rainwater conductor systems in multi-story buildings.

Trusted and preferred. Proudly manufactured in the united states.

Specifications

Product
Connection	Mechanical
Fitting type	Straight Coupling
Flexible	Yes
Material	Elastomeric PVC, Stainless Steel
Color	Black, Silver
Standards	CSA B602
Application	Above Ground, DWV