Clark-Drain has added several new inspection chamber products to extend its 300 series of below ground drainage systems for building and construction.

They are expanding their 300 series of covers, bases and risers to include a range of shallower chamber assemblies to invert depth from cover level of 0.4 metres.

Manufactured in-house from 100% recycled polypropylene, the 300 series will be sold as complete chamber assemblies.

Additional products include a range of 300mm clear opening circular, square to round and recessed paviour covers for pedestrian and domestic driveway drainage applications.

There is also a new 3 inlet ‘level’ base and riser with an effective depth of 0.19m ideal for use at the first drainage point close to buildings. They can be combined with the cover choices in a wide variety of configurations.

Hans Garbutt, Clark-Drain marketing manager, said: “The development of the 300 series will not only provide customers’ with flexibility and choice, but will provide cost effectiveness for the installer.

“The shallow depth riser, for example, means less reliance on cutting down to size, resulting in less on-site waste.

“A tilt action on the frame also enables alignment with the finished ground level on slopes of up 15°, leading to fast levelling during installation.”

The new products are compact, durable and easy to maintain, ensuring long- term performance. Each assembly complies with the relevant sections of Sewers for Adoption 7th Edition guidelines and BS EN 13598-1:2010. Clark-Drain also supplies 450mm clear opening assemblies to invert depths of 1.2 metres to cover level.