Home > Companies > Manthorpe Building Products Ltd > GPD 1000 Linear Drainage Channel

The Manthorpe 1 m linear drainage channel is an easy and effective way of removing unwanted standing water into a domestic drain. The channel and grate have been independently load tested and gained an A15 load rating.

Standard product features

Technical details:

  • Units are supplied in 1000 mm lengths x 119 mm wide x 88 mm high overall.
  • Manufactured from injection moulded polypropylene with a slotted grate.
  • The system is designed for pedestrian and light vehicular traffic, and for use on driveways, patios and paths.
  • The system is compatible with all types of block paving, flag stones, tarmac and concrete.
  • Accessories include a leaf trap and end cap.
  • The unit outlets are designed to fit standard 110 mm underground plastic drainage pipes.
  • The clip down grate can be further secured using 3.5 x 30 mm self-tapping screws at the points provided.
  • Multiple rainwater exit points with easy cut-out features.
  • Sections slot together.
  • Channels have re-usable clips at six points along the length.
  • The system is also suitable as a threshold drain.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
90-05-20/422 Drainage channels with gratings

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Manthorpe Building Products Ltd


+44 (0)1773 514200

Product reference



[Type GPD-LT]
Leaf trap.
[Type GPD-EC]
End cap.

Manufacturer details

Manthorpe House,
Brittain Drive,
Codnor Gate Business Park,
Derbyshire, DE5 3ND
Tel +44 (0)1773 514200
Fax +44 (0)1773 514261
NBS Plus