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 email@example.com, and we’ll get back to you with more information.