Underground Drainage System

Lanlee stock a range of Brett Martin 110mm underground drainage pipes, bends, branches, & fittings, as well as compatible gullies, and underground access & inspection chambers.

Drain Pipe and Fittings

Brett Martin at Lanlee cater for all drain requirements with 110mm solid pipe and fittings. All drainage systems are manufactured in the UK to stringent quality standards, with drain pipe and fittings BS EN 1401/BS EN 13476-2 certified, providing the installer with a completely reliable product range that will continue to perform. Brett Martin Drain systems feature a lip seal within single socket pipe, and a market-leading captive seal within drain fittings, which secures against dislodgement and makes jointing easier, ensuring joints remain leak-free for years to come.

Features & Benefits

Featuring products Kitemarked to BS EN 1401-1 or BS EN 13476-2

Captive Seal within Drain Fittings

Manufactured under a quality management system certified to ISO 9001:2015

Gullies

Brett Martin at Lanlee offers a complete range of gullies for distributing waste and rainwater into 110mm or 160mm underground drainage systems. The range comprises Bottle Gullies (single and double socket), Tubular Gullies with hopper variations, a Yard Gully, Road Gullies, and a range of Grids and Sealing Plates.

 Features & Benefits

• Lightweight for ease of handling
• Strong and durable with excellent chemical resistance

 Choice

• Push-fit Roddable Bottle gullies (single & double socket), Tubular gullies and Yard gully suitable for 110mm drainage networks
• Road gully suitable for 160mm drainage networks
• Grids and sealing plates available to suit the relevant gullies

Underground Access & Inspection Chambers

Brett Martin at Lanlee supplies a range of products which are designed for the maintenance and inspection of underground drains. This range includes access and inspection chambers, lids and frames and access fittings, including rodding points. Combining maximum performance with ease of installation, the chamber assemblies meet requirements of Building Regulations Part H1.

 Features

• Shallow access chambers in nominal diameters 280mm and 315mm
• Inspection chambers in 450mm Diameters
• Lids and frames to fit 280mm - 450mm chambers
• Access fittings in nominal diameters 110mm
• Manufactured under a quality management system certified to ISO 9001:2015

 Benefits

• Meet requirements Building Regulations Part H1
• Inspection and cleaning equipment accesses easily
• Watertight push-fit assemblies
• Robust ribbed polypropylene risers
• Secure screw down lids for added safety

FAQs

Is your uPVC drainage system compatible with competitors?

Yes, our underground drainage system is to EN 1401.

What is the gradient (fall) for 110mm pipe?

For 110mm drainage the gradient is 1:80 with 1 WC. For 160mm drainage the gradient is 1:150 with 5 WC’s.

Do plastic drains block up more than clay drains?

No.

How do I fit waste pipes to a drain?

You can either use an adaptor to the top of the pipe (B4301), (B4501) or a hopper (B1031) with the waste going into the top.

Do you supply an adaptor to go from 4" clay to 110mm PVCu?

Yes part no. B3500 is the adaptor required (110mm PVCu To Standard Clay Adaptor).

Do you have gullies that have rodding facilities?

Yes there are a choice of Back Inlet Roddable Gullies with 90° Outlet available to choose with choice of grid: with Round Grid (B1001); with Rectangular Grid (B1002) and with Square Grid.

What depth can the shallow inspection chambers be installed to?

Shallow Inspection Chambers can be installed to 600mm, which is 2 risers high.

When should an inspection chamber be used?

An inspection chamber should be installed at each change in gradient, direction or pipe size.


Can you use the 280mm and 315mm inspection chambers internally?

Yes, they have a double sealed lid and can be installed in garages.

What type of cover should be used on the inspection chamber?

For the 280mm chamber there is a lid for pedestrian areas (B2802). For 315mm chambers there is lid for pedestrian areas (B3153) and another for driveways (B3154*) which is rated to 35kN. For 450mm chambers there is a lid suitable for driveways (B6255*) and is rated to 50kN. (*See FAQ 'Where can driveway lids be used?)

Where can driveway lids be used?

Brett Martin's driveway lids (B3154 & B6255) are rated to A35 (ISO 15398) and are suitable for installation in private single household driveways which are not part of the road network. They are designed for occasional use only and should not be parked on. Therefore, it is necessary that they are installed outside of the line of drive and not in an area where vehicles turn as turning can generate higher wheel forces and point loads.

Larger 4-wheel drive vehicles and delivery vehicles can generate higher loading again and therefore if there is a possibility of larger vehicles entering the driveway a B125 cover (supplied by others) should be used. Driveway entrances can often be used for turning by larger delivery vehicles, if this is likely to occur a B125 cover should be used here also.

To ensure maximum performance of the driveway lid, the frame should always be installed with a concrete surround at least 300mm wide x 225mm deep. On sloping driveways, the concrete should be extended upwards to surround the frame at ground level and no tarmac should be installed on top of the concrete.

What is a suitable bedding material for the 450mm chamber base?

Granular less than 40mm / concrete.