NBS Source
List your products

The function of the Birco linear drainage system is to intercept, store and transport surface water. For normal surface water drainage there are six different Birco systems.

Birco 150 comprises a range of channels, gratings and covers together with complementary in-line side outlet and junction outfalls. This system is ideally suited to perform in heavily loaded applications.

General information
Specification data - Drainage channels with gratings
Product Reference

Birco 150

Channel invert depth

150 mm

200 mm

250 mm

300 mm

350 mm


Unit nos. 1–20 vary in depth giving a 1% slope.

Gratings -

20 x 12 mm galvanized mesh

20 x 30 mm galvanized mesh

134 x 12 mm cast iron wave slot

150 x 12 mm cast iron slot

Cast iron solid cover

Eclipse, cast iron


500 mm

1000 mm


Contractors choice

In-line side outlet outfall for 150 mm outlet pipe using 500 mm long gratings

In-line end outlet outfall for 100 mm outlet pipe using 500 mm long gratings

Junction/ Outfall unit

Standard product features

Channel size:

250 mm wide x 1000 mm long.

Grating fixings:

Bolted to channel wall sockets.

Grating loading grade:

  • Galvanized grating: Class A/ B/ C/ D/ E to BS EN 1433: 2002.
  • Cast iron grating: Class A/ B/ C/ D/ E/ F to BS EN 1433: 2002.


Cast iron gratings can be colour coated to special order.

Product Options

Channel depth:

Birco 150 channels are produced in five constant invert depths of 100, 150, 200, 250 and 300 mm. Channels with inbuilt falls are also available.

Similar products from Marshalls plc