Land Drainage Specification

The MetroDrain Premium Drainage system has been specified and installed on many civil engineering and construction projects.

Highway Drainage

Naylor MetroDrain is suitable for the collection and disposal of surface and subsurface storm water. The product meets the specific requirements of the Highways Agency Manual of Contract Documents for Highway Works and is an approved alternative to the products in Table 5/1 of the Specification for Highway Works. MetroDrain products can be adopted under the Highways Act (1980).

Building Drainage

The Naylor MetroDrain Premium Drainage System is suitable for non-adopted surface water drains subject to Building Regulations and Standards throughout the UK. BBA Certificate No: 09/H145.


MetroDrain is ideally suited for use in environmental systems such as:

  • Pump and sampling chambers
  • Catchpits
  • Soakaways
  • Stormwater attenuation
  • Manholes

Golf Courses and Sports Fields

MetroDrain is perfect for use in the drainage of sports fields and golf courses. It can also be used in the construction of under pitch heating.


MetroDrain can be successfully used in landfill applications for leachate drainage and methane gas control.


Naylor also manufactures N-Drain – a lighter duty general purpose Twinwall Drainage System for Non BBA applications such as agricultural projects.

Green Inner Wall: MetroDrain – premium BBA product

Black Inner Wall: N-Drain – lighter duty general purpose product