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Cantex PVC Schedule 40 Expansion Coupling for Rigid Conduit
The Cantex PVC Schedule 40 Expansion Coupling is engineered to accommodate axial movement in rigid PVC conduit runs caused by thermal expansion and contraction. This family of expansion couplings is available in 2" and 3" trade sizes, giving installers a Schedule 40 PVC fitting sized to match their conduit run so they can maintain a continuous, properly supported raceway in installations where temperature swings would otherwise stress a fixed joint. Built from PVC for corrosion resistance, the Cantex expansion coupling is a purpose-built component for professional electrical and telecommunications conduit systems that require slip capability without sacrificing raceway integrity.
Key Features
- Trade Size: Available in 2" and 3" sizing for direct compatibility with matching Schedule 40 PVC conduit runs.
- Durable Construction: PVC material provides corrosion and chemical resistance for long service life in exposed and buried conduit systems.
- Schedule 40 Rated: Matches the wall thickness and pressure classification of standard Schedule 40 PVC conduit for consistent system performance across both the 2" and 3" sizes.
- Expansion Function: Purpose-built expansion coupling design compensates for conduit movement due to temperature-driven expansion and contraction, reducing stress on joints and supports.
- Lightweight, Non-Metallic Design: PVC construction simplifies handling and installation compared to metallic conduit fittings, while eliminating the risk of galvanic corrosion.
Technical Specifications
- Product Type: Expansion Coupling
- Product Material: PVC
- Trade Size: 2" and 3"
- Schedule: Schedule 40
Typical Applications
- Rigid PVC Conduit Raceway Systems
- Underground and Above-Ground Conduit Runs Subject to Temperature Variation
- Commercial and Industrial Electrical Installations
- New Construction and Conduit System Expansion Projects
- Telecommunications and Utility Conduit Systems
Why Cantex?
Cantex PVC conduit and fittings are manufactured to Schedule 40 specifications, giving contractors a consistent, code-aligned building block for non-metallic raceway systems. This expansion coupling family reflects that same attention to fit and material integrity, offering electrical professionals a reliable way to manage conduit movement across 2" and 3" conduit runs without compromising the durability of the overall installation. Choosing Cantex components helps ensure compatibility across the full run of Schedule 40 PVC conduit and fittings on a project, whether the job calls for 2" or 3" sizing.
Manufacturer Resources
Product Specs
- Product Type:
- Expansion Coupling
- Department:
- Electrical
- Product Subgroup:
- PVC Conduit & Fittings
- list_batch:
- CAN-20260924
- Product Material:
- PVC
- Product Group:
- Conduit & Raceway
Cantex 5144036 – Frequently Asked Questions
1) Why would I need an expansion coupling in a PVC conduit run instead of a standard coupling?
A standard coupling glues both ends solid, so a long PVC run has nowhere to go when temperature swings make it grow and shrink. That loads the joints and the supports. The Cantex expansion coupling is built to take that axial movement, letting the conduit slip within the fitting while the raceway stays continuous. Use it on runs exposed to temperature variation, above or below grade; use a plain coupling where you are simply joining two lengths with no movement to absorb.
2) Will a Cantex Schedule 40 expansion coupling work on Schedule 80 PVC conduit?
It is built to Schedule 40 specification, matching the wall thickness and pressure classification of standard Schedule 40 PVC conduit. Schedule 80 has a thicker wall and a smaller inside diameter but the same outside diameter at a given trade size, which is how a Schedule 40 socket fitting is normally able to accept it. The product data here only states Schedule 40 conduit compatibility, so for a Schedule 80 run specify a fitting rated for it.
3) Is this PVC coupling OK for direct burial, or only above ground?
Both. The Cantex expansion coupling is PVC, which gives corrosion and chemical resistance for exposed and buried conduit systems, and the stated applications include underground and above-ground runs subject to temperature variation. Buried runs still move, so an expansion fitting is as relevant below grade as above.
4) We run metal conduit in some areas. Can I use this expansion fitting on rigid steel conduit?
No. This is a non-metallic PVC fitting sized and socketed for rigid PVC conduit. For steel raceway you need a metallic expansion fitting with threaded hubs. One advantage of staying all-PVC on a run is that there is no galvanic corrosion risk at the joint, and the fitting is far lighter to handle than a metallic equivalent.
5) What do I order for a telecom or utility duct bank in 3 inch PVC that needs movement capability?
The 3 inch Cantex PVC Schedule 40 expansion coupling, MPN 5144038. Telecommunications and utility conduit systems are among its listed applications, and it keeps the raceway continuous while absorbing conduit movement. Pair it with 3 inch Schedule 40 PVC conduit and fittings so the socket sizes match across the run.
6) For a facility standardizing on one conduit system, does this fitting keep everything consistent?
Yes. Cantex conduit and fittings are made to Schedule 40 specifications, so the expansion coupling drops into the same 2 inch or 3 inch Schedule 40 PVC run as the rest of the Cantex components on a project. Standardizing on one manufacturer's Schedule 40 line keeps socket fit and material consistent across the raceway, which matters when crews are stocking a truck or an MRO shelf.
How fast can I get the Cantex 5144036 delivered?
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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 5144036 come with a warranty?
Absolutely. The Cantex 5144036 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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