Adopting a new approach

BRETT Martin Plumbing and Drainage has launched a new range of adoptable access and inspection chamber assemblies, which the firm said are designed to meet the requirements of Sewers for Adoption (SfA7) and offer specifiers and water authorities a “robust, cost-effective and superior” drainage solution.

Following the revised performance criteria and installation standards for all adoptable drainage networks, Brett Martin added that its new range, carrying the BSI Kitemark KM 635998, has been tested to EN13598-1 and also satisfies Building Regulations Part H1.

With “enhanced” sealing capacity using captive seals to prevent dislodgement and five inlets offering built-in falls to prevent blockages, the adoptable access and inspection chamber assemblies are available in 315mm and 450mm diameters.  Both are described as offering “superior structural strength, enhanced loading capability for long-term serviceability and improved heavy-duty risers”.

Chris Dawson, Brett Martin sales director said, “This combination of strength, loading capabilities and exceptional sealing means that our high performance chamber assemblies offer a wide range of benefits to the installer and meet all of the latest regulatory requirements.”

The lightweight chamber assemblies are said to offer ease of installation due to watertight push-fit assemblies and a solid, stable connection using the additional connection points in the form of lugs featured on both base and riser.

A stronger base allows for over 16 connection possibilities, reducing merchant stock-holding requirements for multiple base variants.

The 315mm shallow access chamber assembly complies with Building Regulations Part H1 to a depth of 600mm and SfA7 to a depth of 900mm. Pedestrian covers for foot traffic areas or driveway covers to withstand heavier loads are available, while Brett Martin said that a height and tilt adjustable frame can accommodate a surface incline of up to 15°.

For deeper applications, the 450mm inspection chamber assembly complies with Building Regulations Part H1 to a depth of 3.0m and SfA7 to a depth of 1.2m. They are available with two base options for 110mm and 160mm drainage layouts, which the firm said feature enhanced cross foot design for added stability. Described as “ideal” for tarmac, grass or gravel areas, the cover and frame is available in round or square options, with a “safe and secure” lid for compliance with Building Regulations Part H, clause 2.54.

Brett Martin also offers a range of non-adoptable access and inspection chamber assemblies in 280mm, 315mm and 450mm diameters.