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Cantex 5335969 PVC Base Spacer
The Cantex 5335969 PVC Base Spacer is a purpose-built support fitting designed to elevate and properly position conduit runs, transformer pads, or equipment bases above grade in underground and at-grade electrical installations. Molded from rugged PVC, this base spacer resists corrosion, moisture intrusion, and the harsh below-grade conditions that quickly degrade metallic hardware, making it a durable, maintenance-free choice for utility, commercial, and industrial electrical work. This base spacer family is available in a range of footprints, from 2" x 3" up to 5" x 3", giving installers a consistent, stable standoff dimension to select from depending on the conduit or equipment base being supported. Each size in the range helps maintain proper clearance and alignment during concrete encasement or direct-burial conduit placement, contributing to a cleaner, more professional installation that holds its position through backfill and curing.
Key Features
- Size Range: Available in 2" x 3", 3" x 3", 4" x 3", and 5" x 3" footprints to provide a consistent, reliable standoff for a range of conduit and equipment base sizes.
- Durable Construction: Molded PVC material resists corrosion, rust, and moisture damage common to below-grade and at-grade installations.
- Non-Conductive Material: PVC construction adds a layer of electrical isolation compared to metallic spacers, supporting safer handling on the jobsite.
- Lightweight Design: PVC construction is easy to handle, transport, and position on-site without specialized lifting equipment.
- Stable Support Base: Designed to hold conduit or equipment at a consistent elevation during placement and concrete pour, reducing shifting and misalignment.
- Cantex Quality: Manufactured by Cantex, a recognized name in PVC electrical conduit and fitting products for underground and industrial applications.
Technical Specifications
- Brand: Cantex
- Product Type: Base Spacer
- Material: PVC
- Size Range: 2" x 3" through 5" x 3"
Typical Applications
- Underground Conduit Installations
- Transformer and Equipment Pad Support
- Utility and Substation Electrical Work
- Commercial and Industrial Conduit Systems
- Concrete Encasement Projects Requiring Consistent Standoff Elevation
Why Cantex?
Cantex is a trusted manufacturer of PVC conduit, fittings, and support products engineered for demanding underground and at-grade electrical installations. This PVC base spacer family reflects that commitment to durable, corrosion-resistant materials that hold up to burial and concrete encasement, giving contractors a dependable range of standoff sizes for maintaining proper conduit and equipment placement. Choose Cantex for consistent quality and long-lasting performance across every size in your electrical infrastructure projects.
Manufacturer Resources
Product Specs
- list_batch:
- CAN-20260924
- Product Type:
- Base Spacer
- Department:
- Electrical
- Product Subgroup:
- PVC Conduit & Fittings
- Product Material:
- PVC
- Product Group:
- Conduit & Raceway
Cantex 5335979 – Frequently Asked Questions
1) What sizes does the Cantex PVC base spacer come in, and what are the part numbers?
Four footprints, all with the same 3 inch dimension: 2 x 3 inch (MPN 5335979), 3 x 3 inch (MPN 5336031), 4 x 3 inch (MPN 5335969), and 5 x 3 inch (MPN 5335978). Pick the footprint to match the conduit or equipment base you are supporting; the standoff dimension stays consistent across the range.
2) Can PVC base spacers be left in a concrete-encased duct bank, or do they have to come out before the pour?
They stay in. The Cantex base spacer is molded PVC and is meant to hold conduit or an equipment base at a set elevation through backfill and the concrete pour, so it gets encased with the run. Because it is PVC rather than steel, there is nothing in it to rust out of the encasement later.
3) I am building a duct bank and need a 5 inch base spacer. What are my options?
Two we carry at 5 x 3 inch: the Cantex PVC base spacer, MPN 5335978, and the Kraloy 029578 (BS6045) ABS Vertical-Lok base spacer from the SuperDuct series. The Cantex is molded PVC; the Kraloy is ABS and part of the SuperDuct system, so if your run is already SuperDuct duct and intermediate spacers, that is the one that matches the rest of the stack.
4) Will a PVC base spacer hold up in direct burial, or should I use a metal one?
PVC is the better choice below grade. Metallic spacers corrode in wet soil and in the alkaline environment of fresh concrete; this Cantex spacer is molded PVC and resists corrosion, rust, and moisture intrusion in direct-burial and at-grade work. It is also non-conductive, so it adds a layer of electrical isolation a steel spacer does not.
5) Does a base spacer go at the bottom of the duct bank or between the layers of conduit?
The base spacer is the bottom course. It sets the conduit or equipment base up off grade at a consistent standoff before backfill or encasement. Spacers stacked between conduit layers are intermediate spacers, a different fitting. The Cantex 2 x 3 through 5 x 3 inch range is all base spacers.
6) Is the Cantex base spacer interchangeable with a Kraloy SuperDuct base spacer?
They do the same job at the same 5 x 3 inch footprint, but they are different systems and materials: Cantex is molded PVC, and the Kraloy 029578 BS6045 is ABS built as part of the SuperDuct Vertical-Lok line. If your duct bank is being assembled with SuperDuct components that interlock vertically, stay within that line rather than mixing in the Cantex.
7) Should I use a PVC or ABS base spacer for underground conduit support?
Both do the same job of holding conduit at a consistent standoff during backfill and concrete encasement. The Cantex 5335969 family is molded PVC, which is corrosion-resistant, non-conductive, and lightweight for below-grade work. The Kraloy 029578 BS6045 is an ABS spacer. Match the spacer material to the duct system you are installing so the support and the raceway behave the same way under load and pour.
8) Is a conduit strap or hanger a substitute for a base spacer like the Cantex 5335969?
No. A base spacer sits under the conduit run or equipment base to hold it at a fixed elevation above grade during placement and concrete pour, which is what the Cantex 5335969 PVC base spacer does. Straps and hangers secure conduit against a surface or structure and do not establish a standoff dimension in a trench or duct bank. If you need the run held off the bottom at a set height, you need a base spacer such as the Cantex 5335969 or the Kraloy 029578 BS6045, not a strap.
9) Can I use these Cantex base spacers under a transformer pad, not just conduit?
Yes. Alongside underground conduit runs, the applications include transformer and equipment pad support, utility and substation work, and commercial and industrial conduit systems. The job is the same either way: hold the load at a fixed elevation so it does not shift during placement and curing.
How fast can I get the Cantex 5335979 delivered?
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Can I return it if it doesn’t work for me?
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Cantex 5335979 come with a warranty?
Absolutely. The Cantex 5335979 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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