Cantex PVC Expansion Coupling,...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$56.29
Cantex PVC Expansion Coupling, 1-Inch and 4-Inch

Cantex PVC Expansion Coupling, 1-Inch and 4-Inch

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Model: 5144033

In Stock (leaves warehouse same day if ordered before 3pm ET)

$56.29
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Cantex 51440 PVC Expansion Coupling

The Cantex 51440 PVC Expansion Coupling is a purpose-built conduit fitting designed to accommodate the natural expansion and contraction that occurs in long runs of PVC conduit as ambient and surface temperatures shift. Manufactured in durable PVC and available in trade sizes from 1" through 4" to match standard PVC conduit runs, this expansion coupling allows the conduit system to move axially within the fitting body without placing stress on the conduit run, the connected fittings, or the enclosures at either end. It is engineered for use in above-ground and underground PVC conduit systems where temperature-driven length changes must be managed to protect the integrity of the raceway and the conductors it protects.

Key Features

  • Trade Size Range: Available in 1" through 4" trade sizes to match standard PVC conduit runs for direct installation without adapters.
  • Durable Construction: Molded PVC body resists corrosion, moisture, and chemical exposure common in both exposed and underground conduit installations.
  • Expansion Function: Allows longitudinal conduit movement to relieve stress caused by thermal expansion and contraction along extended conduit runs.
  • System Protection: Helps prevent fitting failure, joint separation, and conductor stress that can otherwise result from unmanaged conduit expansion.
  • PVC Conduit Compatible: Designed to integrate with standard PVC conduit systems as part of a complete raceway installation.

Technical Specifications

  • Trade Size Range: 1" - 4"
  • Material: PVC
  • Type: Expansion Coupling

Typical Applications

  • Long-Run PVC Conduit Installations
  • Underground and Above-Ground Raceway Systems
  • Commercial and Industrial Electrical Infrastructure
  • Temperature-Exposed Conduit Runs Requiring Movement Accommodation
  • New Construction and Renovation Conduit Systems

Why Cantex?

Cantex PVC conduit fittings, including this expansion coupling series, are built to support reliable, long-lasting electrical raceway systems. The durable PVC construction is designed to hold up to the demands of both exposed and buried conduit applications, helping electrical professionals maintain a stable, well-protected conduit run over time across the full 1" to 4" size range.

Manufacturer Resources

Product Specs

list_batch:
CAN-20260924
Product Type:
Expansion Coupling
Department:
Electrical
Product Subgroup:
PVC Conduit & Fittings
Product Material:
PVC
Product Group:
Conduit & Raceway

Cantex 5144033 – Frequently Asked Questions

1) What sizes does the Cantex 51440 PVC expansion coupling come in?
Two trade sizes are sold: 1 inch (MPN 5144033) and 4 inch (MPN 5144040). Both are molded PVC and slip onto standard PVC conduit of the matching trade size, so no adapters are needed to tie into a 1 inch or 4 inch run.
2) Why would I need an expansion coupling in a long PVC conduit run instead of a standard coupling?
A standard coupling locks two lengths of conduit together. PVC moves measurably with temperature, so on a long exposed run that locked joint transfers the movement into the fittings and the boxes at each end. The Cantex 51440 lets the conduit slide axially inside the fitting body instead, which relieves that stress and helps prevent joint separation, fitting failure, and strain on the conductors. If the run is short or in stable temperature, a plain coupling is all you need.
3) Can a PVC expansion coupling be used on buried conduit, or is it only for exposed runs?
Both. The 51440 is intended for above-ground and underground PVC raceway systems, and the molded PVC body resists corrosion, moisture, and chemical exposure found in buried installations. Underground runs see less temperature swing than exposed ones, so expansion fittings are most often specified where conduit emerges from grade or runs along a wall in sun.
4) Will this Cantex expansion coupling glue into standard Schedule 40 PVC conduit fittings?
It is built to integrate with standard PVC conduit systems at the matching trade size, 1 inch or 4 inch, as part of a complete raceway. The body is PVC, so it joins to PVC conduit in the normal way for the system. It is a conduit fitting, not a plumbing part, so pair it with electrical PVC conduit rather than pressure pipe.
5) What part number do I order for the 4 inch Cantex expansion coupling?
The 4 inch is MPN 5144040; the 1 inch is MPN 5144033. Size is the only thing you specify, there is no finish or handing choice on this fitting.
How fast can I get the Cantex 5144033 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Cantex 5144033 come with a warranty?
Absolutely. The Cantex 5144033 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Cantex 5144033?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Cantex 5144033 from ZenSupply?
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