Underground Drainage

Are you looking for supplies for your underground drainage system? Well, look no further.

At Cotterill Civils, we provide a range of sewer pipes and pipe fittings in sizes starting from 110mm up to 160mm – all specifically designed for underground drainage installation.

Whether you’re setting up a domestic or civil system, we’re confident you’ll find everything you need.

A choice of underground drainage pipes and fittings

PVC sewer pipe is now the most widely used drainage system for housing and light commercial applications – serving as an excellent alternative to clay pipes.

Made from uPVC (unplasticized polyvinyl chloride), our 110mm and 160mm underground drainage pipes and fittings are lightweight and easy to handle when installing, replacing or repairing them.

Our sewer pipe fittings are suitable for all necessary installations and sewer pipe repairs. These include (but are not limited to) couplers, bends, junctions, screwed access caps, level invert reducers, inlet bottle gullies, traps, plain-ended soil pipe, draw rope, and sealed aluminium rodding eye.

Whether it be socket plugs and radius bends, T and Y junctions, or knuckles and square top adaptors, we guarantee that our underground drainage fittings are just as flexible as the pipes – minimising potential damage. 

Inspection chambers and manhole covers to suit every need

We understand that demands and applications can vary considerably, which is why we stock a variety of inspection chambers and manhole covers for new builds and refurbishments.

Our plastic and concrete inspection chambers are available in a range of diameters and suit either 110mm or 160mm underground drainage pipework. Each one is designed to make it easier for you to clean your drains regularly – preventing the formation of debris and eliminating the risk of blockages.

Drain covers (otherwise known as manhole covers) come in a selection of load-bearing classes, meaning you should have no problem finding one that will perform well under the strain of cars, trucks, and aeroplanes.

As with all the products within our underground drainage inventory, our chambers and covers are priced competitively and can be delivered to your address within a few days. 

Ready to buy underground drainage supplies?

Here at Cotterill Civils, we stock only the best quality underground drainage supplies from reputable names, such as Aquaflow, Flexseal, Polydrain, and Turtle Enviro.

For those looking for a cost-effective alternative, we also supply our very own branded products, allowing you to purchase fantastic products without spending a fortune.

Browse our online underground drainage collection to identify the most suitable components for your drainage system. If you’re spoilt for choice, use the filters on the left-hand side to help narrow your search, and click on the different products available to learn more about their specifications.

Once you’ve found the items you need, simply add them to your basket and proceed to the checkout. From here, you can then select your preferred delivery and payment method. As soon as your order has been received and payment processed, we will dispatch your order – meaning you needn’t wait too long for your underground drainage pipes and fittings to arrive at your door. 

Get in touch today

If you have any questions regarding our underground drainage products, or you need an expert opinion, please don’t hesitate to contact our specialists.

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Frequently Asked Questions

Which underground drainage pipes are right for me?

Here at Cotterill Civils, we stock PVC underground drainage pipes in lengths of 3m or 6m.

These are terracotta (brown) in colour and come in 110mm and 160mm diameters.

110mm underground drain pipes are typically used for domestic drainage systems, whereas 160mm pipes are frequently used for larger underground installations.

All of our underground drainage is manufactured from PVC, which is lighter and easier to handle than traditional clay pipe. This material is also easier to cut and join – making the installation process much simpler.

The underground drain pipes within our collection are socketed. They come with a lip seal that makes the process of joining easier and the appropriate underground drainage fittings are used. They are also secure against dislodgement.

To discuss your underground drainage requirements in further detail with our team, give us a call on 0121 351 3230.

How long do PVC pipes last underground?

Often, the longevity of underground drainage pipes can vary depending on the precise composition of the surrounding soil.

But the good news is, PVC is an exceptionally light and durable material, and our 110mm and 160mm underground drainage pipes and fittings are manufactured to BS4660 or BS EN 1401 as standard. This means that they should last anywhere up to 50 years – if not longer!

To prolong the lifespan of your underground drainage – reducing the need for repairs and replacement pipes – we highly recommend proper installation and regular maintenance

For more tips on how to make your PVC drain pipes last as long as possible, don’t hesitate to talk to the team today.

What are the benefits of PVC underground drainage pipes?

Although many older properties use clay or cast iron sewer pipes, PVC pipes have become increasingly popular over the years.

One of the advantages of using PVC for underground drainage is that this material is incredibly lightweight, meaning it’s easy to handle and install.

It’s also remarkably strong, helping to minimise cracking and breakage which, in turn, eliminates the need for replacement underground drainage pipes.

PVC pipes are more flexible than their rigid counterparts, too, including clay, cast iron and concrete. This means that the risk of potential damage is significantly reduced – allowing your underground drainage system to function efficiently.

If you’d like to know more about the benefits our underground drainage pipes and underground drainage fittings can bring, please feel free to get in touch with our specialists.

How deep should underground drainage be?

Underground drainage is typically laid in a trench that is lined with a pea shingle at the bottom.

Ideally, the trench needs to be at least 300mm deeper than ground level and 300mm wider than the pipe itself. For example, 110mm pipes will need to be laid 410mm below the ground.

As a general rule of thumb, it’s advised that 110mm drainage is laid to a fall of 1 in 40 on installations of 5 houses or less. But if you have any uncertainty, check with your local authority.

Once the underground drainage pipes are in position, at least 300mm of granular material (fine soil with no stones or pea shingle) needs to be applied over the top of the pipe before the original turf can be laid atop.

A paving slab can be used to protect your underground drainage against harm from contact.

If you have any further questions regarding the installation process, send us an online message and we’ll get back to you.

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