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Twinwall duct pipe (Blue/Water) - 150/178mm x 6m

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This twinwall duct is used for underground water services.

Product spec:

  • Colour: Blue
  • Purpose: Underground water
  • Material: HDPE
  • Internal: 150mm
  • External: 178mm
  • Length: 6m twinwall ducting for underground water
  • Comes with drawcord


  • Manufactured in HDPE
  • Flexible
  • Strong
  • Corrosion resistant
  • Impact resistant at low temperatures
  • Lightweight
  • BBA approved
  • Kitemarked certified to BS EN 61386-24
  • Suitable for underground water

Full Description

We supply a wide range of twinwall duct coil to suit your needs. This twinwall duct coil is 150/178mm and 6m long – suitable for underground water.

Why purchase twinwall ducting?
At Cotterill’s we offer an advanced and comprehensive range of ducting. We can help meet the needs of all civils, utility and telecommunication markets. These ducting systems offer the advantages of a lightweight flexible product combined with high strength and durability.

These ducts are manufactured in polyethylene the pipe is normally supplied in either 6m lengths or 50m coils. This twinwall duct is made from HDPE (High Density Polyethylene), being both strong and resistant to corrosion. Like our flexible duct, it is designed to meet the current compressive strength requirement of the Highways Agency. The external corrugated profile gives the product added strength and the internal bore is smooth to prevent cables from snagging.

You should always choose a diameter that allows plenty of room within the duct to allow the cable or cables to be drawn through smoothly. The internal wall is smooth allowing cables/pipes to be pulled through easily and prevent snagging, whilst the external wall is corrugated which can withstand high compressive forces and gives added strength during installation. This duct is also both BBA approved and kitemarked certified to BS EN 61386-24, providing peace of mind.

If you plan to run any type of service underground, it should be running inside a duct system. A duct is designed to protect the service cable or pipe from damage and alert others to the presence of duct in the ground.

Why purchase blue/water twinwall duct coil?
Blue twinwall duct is used for ducting water supply pipes. Water supply services should be installed at a depth of between 750mm and 1350mm. This should ensure that the pipe is unaffected by either frost or potential surface digging.

What are the benefits of twinwall duct coil?
Twinwall ducting has many benefits when it comes to underground services:

Manufactured in HDPE
Extremely flexible
Strong and impact resistance at low temperatures
Corrosion resistant
Lightweight allowing for easy installation
Twinwall – smooth on the inside, rugged out the outside
Kitemarked certified to BS EN 61386-24 and BBA approved for peace of mind
Suitable for underground water systems

Technical Specification

Purpose: Underground Water

Material: HDPE

Colour: Blue

Length (mm): 6m

Internal: 300mm

External: 354mm

Product Details

Diameter (mm):

Height (mm):

Weight (kg):

Capacity (litres):

Need some advice?

Our team of experts are available and ready to speak to you. You can contact us or call us directly on 0121 351 3230. Available Mon-Friday 8am-5pm.

Installation Service

We also offer an installation service for our stormwater attenuation, rainwater harvesting, water storage and sewage treatment solutions.

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Further questions?

Our team of specialists are here to help. We install many of our products so can provide real-world advice. We also offer a free take-off service if required.

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