Twinwall Pipe

Twinwall drainage pipe you can rely upon

Add value and maximise profits with our twinwall drainage pipe. This cost effective solution eradicates and prevent wet spots, water logged pitches and black grass. We provide a wide range of perforated and unperforated twinwall pipe from the UK’s leading brands.

Whether you’re looking to prevent pitches from becoming waterlogged or improve crop yields, we will have the right twinwall drainage pipe for you. Easy to transport and install, our pipes are manufactured in High Density Polyethylene (HDPE) with a corrugated outer wall for additional strength.

What is twinwall pipe?

Twinwall pipe is pretty much what it says on the tin – two plastic HDPE pipes that are welded together inside one another. The outer wall is corrugated whilst the inner wall is smooth to allow water to easily flow through.

What is perforated twinwall pipe?

Perforated twinwall pipe, also referred to as filter drain, has a series of holes cut inside the corrugations of the pipe. These holes are used to collect and carry water from a waterlogged or saturated area to a designated place, such as a storm drain or a natural watercourse like a stream. The pipe can be supplied as fully perforated or half-perforated, depending on your specific requirements.

What is unperforated twinwall pipe?

In contrast to perforated twinwall pipe, the unperforated pipe is completely solid and does not have any holes along its bore. Also referred to as carrier pipe, it is used to carry (and not collect) water to a discharge point, such as a storm drain or natural watercourse.

What are the benefits of twinwall pipe?

  • Increase crop yields
    Depending on the condition of the land, well-drained land can improve crop yields by as much as 150%.
  • Improve soil quality for crops
    Having well-drained soils is vital to the health of your crops. Benefits include good soil structure for root development and oxygen for organic material, an extension to the growing or grazing season etc.
  • Prevent black grass
    In order to tackle this tricky problem, it is important to improve and maintain good soil structure by ensuring your land is well drained.
  • Prevent waterlogged sports pitches
    Prevent lost revenues through waterlogged pitches by ensuring they can be used all year round.

What is the difference between twinwall pipe and land drainage pipe?

As both pipes have similar uses, it can be confusing deciding which one you need. Using the right product for your application is important though, especially as the products are distinctly different:

Land drainage coil – mainly used to drain small gardens and large fields. These pipes are flexible and easy to transport and handle.

Twinwall pipe – generally used for bigger projects. These pipes are rigid and inflexible and the bigger the diameter, the heavier the pipe tends to be.

Using the right product for your application is important – if you’re in any doubt please get in touch, we’re always happy to help.

How to install twinwall pipe?

To install twinwall pipe, you will first need to dig out a trench, then lay the pipe on the trench bed. Once in place, backfill and side fill the trench with gravel. Then smooth over and finish the ground with topsoil.
What sizes are available in twinwall pipe?

Our twinwall pipe comes in 6-metre lengths and ranges from 100mm to 3500mm diameter. The size you will require will depend on what sector and where you wish to install the twinwall.

Our pipe can be perforated or unperforated depending on your requirement, and we supply a full range of junctions, bends and adaptors.

Twinwall Sizes available

Sizes from 100mm to 3500mm diameter, supported by a full range of junctions, bends and adaptors.

High strength & durability

Manufactured from high performance HDPE and with a corrugated outer wall for additional strength, the pipe is less vulnerable to cracking and is idea for cold weather conditions.

Lightweight & easy to handle

Its lightweight material makes it easier to transport, handle and install than concrete or clayware.

Minimal joining

Minimal joining compared to concrete or clayware.

Increase yield potential

Make every acre count and buy back your unprofitable ground. Our land drain coil optimises your soil structure and yield, in turn maximising profits.

 Increase land value

With land prices soaring, getting the optimum productivity and yield from every acre has never been more important. Efficiently drained land puts the landowner in a more favourable position with regard to selling or letting the land.

Improves playing surfaces

Efficient drainage of playing surfaces allows for enhanced performance, less games to be called off due to water logged pitches, the minimisation of injury and importantly increased overall enjoyment.

Top tips for land drainage

We understand the importance of land drainage and the difference it can make.

That’s why we regularly share research, tips and news items related to land drainage. Here’s just some of our articles:

Read more articles

Our Guarantee

BSI Kitemark approved, our cost effective land drainage solution will improve your soil structure, yields and profitability.

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Frequently Asked Questions

Where can Twinwall pipes be used?

Twinwall pipes are made from two HDPE pipes that are welded together, one inside the other. The inner wall is smooth to assist with the flow, whereas the outside is corrugated. These drainage pipes are designed to carry surface water below the ground, and can also be used for non-pressurised applications, such as rainwater harvesting. Twinwall pipes can benefit various industrial applications, including highway, railway, and airport projects, as well as crop ventilation. They are an excellent choice for yard drainage systems and landfill sites, and can also drain excess water from your garden – eliminating wet spots.

Are Twinwall pipes easy to install?

Yes, Twinwall pipes are simple to install when you know how. The first step is to prepare the trench, according to the manufacturers’ guidelines. The width of the trench needs to be between 300mm and 600mm, and it should have a pipe bed that you can lay the Twinwall pipe on top of. After lowering the pipe into the trench, use granulated gravel to side-fill the hole and support the pipe. Once you’ve done this, you can then backfill the trench. Pebbles or shingle (stones no bigger than 50mm) must be compacted after achieving a depth of 300mm, before covering the trench with a suitable surface material. For more installation tips, talk to the team at Cotterill Civils today.

How much do Twinwall pipes cost?

The cost of Twinwall pipes can vary depending on numerous factors – including the brand, type of pipe (i.e. perforated or unperforated), and the pipe’s diameter and length. Here at Cotterill Civils, we pride ourselves on offering top-quality products at some of the most affordable prices around. Whilst we have something to suit every application, we can assure you that you won’t need to break the bank to eradicate wet spots in your garden or waterlogged sports pitches! For a better idea of how much a Twinwall pipe will cost you (with and without VAT), scroll through our online range in full. If you’re spoilt for choice, use the filters on the left-hand side to help narrow your options down. You can also sort the results by ‘price low to high’, to reveal the cheaper products towards the top of the page.

How do I choose the right size Twinwall pipe?

Knowing which Twinwall pipe size to choose can be tricky – but it generally depends on your application and where it will be installed. For instance, if you’re draining water away from a small field, garden, or driveway, a 110mm or 150mm perforated Twinwall pipe is favourable. Alternatively, on highways, you can use almost any unperforated pipe size from 150mm up to 600mm. If you’re still unsure which Twinwall pipe is best for your project, you’re more than welcome to contact the team at Cotterill Civils. Either give us a call on 0121 351 3230 or send an email to, and we’ll get back to you with more information.

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