Can you use flexible conduit underground?

Can you use flexible conduit underground? 150 150 Flex-It Co. Uk - Flexible Conduit Systems & Wiring Accessories

Almost every building makes use of utilities and services that rely on a network of cables and pipework to carry them to and from the property. But can flexible conduit be used underground?

Good news – yes! Thanks to their flexibility and mechanical resistance flexible conduits can be installed underground to protect utilities against damage, tampering and weathering.. Flexible conduits come in extremely useful and offer a host of safety features, including corrosion, flame and water resistance.

There are millions of miles of cables in the UK so leaving them on the surface would be virtually impossible – and a bit of a trip hazard! Flexible conduits, buried underground, make a far safer and neater alternative. They are often used for longer runs as they are quicker to install than their rigid counterparts.

When pipes and cables are buried, they should be laid in a duct. The coil will contain a draw cord that enables pipes or cables to be pulled through once it’s installed. Coils can then be joined together using loose couplers.

Here at Flex-It, we supply the best flexible conduit systems on the market – perfect for areas where space is at a premium. Our conduits have the flexibility to negotiate tight bends, twists and turns and are straightforward to lay. But, when it comes to using a flexible conduit underground, there is only one product for the job…twin walled underground burial conduit!

Twin walled underground burial conduit range

Underground flexible conduit is great. It’s made from HDPE by a twin-extrusion process – meaning that two pipes are extruded simultaneously, one inside the other, and heat welded in one continuous process. It has a corrugated exterior and smoother inner core.

This flexible conduit is one of the most robust and offers high chemical and water resistance, allowing installation even if irregularities in the ground are present.

At Flex-It, we supply the flexible conduit in an assortment of sizes, including:

  • 40mm
  • 50mm
  • 63mm
  • 110mm
  • 160mm

They are available in 25 and 50m coil lengths and supplied in various diameters, ranging from 32-137mm on the interior, and 40-160mm on the exterior. All coils within this series are supplied complete with one conduit coupler per coil and the draw-cord pre-installed throughout.

If you would like to know more about our underground flexible conduit range, or for help with flexible cable management, don’t hesitate to get in touch. We are always on hand to help and will be more than willing to answer your questions. Feel free to call 01530 812 195 or drop us an email at and we will get back to you as soon as we can.

Frequently Asked Questions

Even though underground wires are much safer than those buried above ground, you’re still going to want the extra security that a conduit can provide.

Made of high-density polyethylene (HDPE) using a twin-excursion process, two pipes are extruded simultaneously, one inside the other, and heat welded in one continuous process.

With a corrugated exterior and smooth inner core, you can be confident your wires remain intact.

HDPE also offers countless benefits, including high chemical, water and UV resistance, providing excellent protection for your underground wiring systems.

Using this material also means that our underground conduits are extremely affordable – but this isn’t to say that the quality is compromised. With our twin-walled underground burial conduits, you get the best of both worlds!


Like the rest of our flexible conduits, our UGC series is available to browse online via our website, but the ordering process will be a little different, though.

They’re available for non-stocked special orders only – so if you’re after some of our twin walled underground burial conduits, you’ll have to enquire with us directly.

Depending on the size of your order, we may have to organise for you to come and collect your items due to their bulky size – but if you’re ordering mass quantities, delivery can be arranged.

If you have any questions at all, please don’t hesitate to get in touch.

At Flex-It, we pride ourselves on being able to offer the highest quality conduits at some of the most affordable prices on the market.

The cost of our underground conduits is determined by size – so obviously, the larger the conduit, the more it’ll cost.

If you have any queries regarding which size conduit will be best for your project, be sure to give our experts a call on 01530 812 195 – we’re always more than happy to assist you!

Here at Flex-It, we’ve been providing the highest quality electrical conduits to our customers since 1995, and we’ve built an excellent reputation for ourselves.

Having worked with several high-profile companies – including The National Portrait Gallery and Buckingham Palace – we’re your go-to supplier of conduit systems in the UK.

Why not join them and become one of our many satisfied companies?

Our range of both indoor and outdoor flexible conduits is huge, so you’re bound to find everything you’re looking for.

Unsure if the UGC series is right for you?

Give us a call to speak to us directly or send us an email at and we’ll be in touch as soon as possible. We’re more than happy to answer any of your questions!

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