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At Clark-Drain we are well known for being a family-run business that is ‘grounded in expertise’, continually developing innovative drainage and access products and solutions. However, what is perhaps less well known, is the full breadth and range of our products.

As the first manufacturers in the UK to make polypropylene channels, we have an entire family of polypropylene drainage channels available to suit every requirement.

CD 422/MESH – Polypropylene Domestic Channel

This is our most well-known and popular polypropylene channel, perfect for domestic settings or within landscaped areas such as patios, paths, gardens and driveways. Made from recycled polypropylene, with a mesh grating, A15 load rating, spring-lock connections and 4.3 litres per second max through-flow, the CD422 is fast and easy to install.

CD 425 – Polypropylene Domestic Channel with Galvanised Steel

Our CD 425 polypropylene channel is very similar to the CD 422. It also has an A15 load rating, 4.3 litres per second max through-flow, and is most suitable for use on driveway, garage thresholds and landscaped areas such as patios. The grating is made from galvanised steel to provide a slightly different appearance for your customers.

CD 410 – Polypropylene Domestic Shallow Channel

For applications where depth is restricted, our CD 410 polypropylene channel is the perfect choice. With a lower profile and mesh grating, the external dimensions of its depth are just 92mm yet it still comes with an A15 load rating, 2.2 litres per second max flow-through and simple locking mechanism for easy installation.

CD 430 – Polypropylene Block-Slot Channel

Our CD 430 is an effective and inexpensive slot drainage option, which leaves an unobtrusive line along the surface. With a slot size of 10 by 47.5 mm, load rating of up to C250 and max through-flow rate of 2.2 litres per second, it is suitable for areas where there is light vehicular traffic and is particularly popular for block paved driveways and pedestrian precincts where appearance is an important factor.

CD 434 – Polypropylene B125 Channel with Narrow Slotted Grating

The CD 434 comes with a narrow slot heel-guard grating. With a load rating of B125, max through-flow of 4.3 litres per second and heat resistant (making it suitable for tarmac edging), this channel is Network Rail approved and suitable for areas such as car parks, shopping precincts, pavements and rail platforms.

CD 437 – Polypropylene C250 Channel with Ductile Narrow Slotted Grating

The CD 437 is a polypropylene channel with a load rating classification of C250, making it suitable for areas with light, slow-moving traffic. Weighing just 9kg, it remains a lightweight option and the locking bar and bolt keeps installation simple. The ductile iron grating also has narrow slots which prevent heels from getting stuck, making it the perfect choice for pedestrian areas.

At Clark-Drain, we want to make access and drainage easy for our customers, which is why all of our polypropylene drainage channels have male/female connections, to allow quick installation of up to 3 metres at a time.

We have never been a company that takes a one-size-fits-all approach. We understand that every customer and project is unique, which is why we develop a breadth of products that are designed and manufactured in the UK, to ensure our customers can find the optimal solution to meet their individual needs.

For further information, please get in touch on 01733 765317 or visit

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