375/426mm Unperforated Twinwall Pipe - 6m Length

This 375/426mm (ID/OD) unperforated plain-ended twinwall pipe is designed to transport collected surface water. Acting as a carrier drain, it channels water to a suitable discharge point and is commonly used for roads and highways drainage applications in this diameter.

Manufactured from HDPE using a twin extrusion process, the pipe combines a robust corrugated outer wall with a smooth inner wall to support efficient hydraulic performance.

Features & benefits include:

• 375mm drainage pipe suitable for transporting surface water.
• Lightweight construction for easier handling and transportation.
• Quick to install - helps reduce plant and labour requirements on site.
• Corrugated external wall provides strength whilst maintaining a low overall weight.
• Smooth internal bore assists hydraulic performance and flow efficiency.
• Design helps minimise the accumulation of silt within the pipe.
• Can be cut on site using conventional hand tools when required.
• Suitable for use in a wide range of soil conditions.
• Compatible with a range of 375mm twinwall fittings and accessories.
• Manufactured from HDPE and compliant with HAPAS/BBA requirements.

Please Note: All images shown are used for illustration purposes only and may differ from the actual product supplied.

Specifications

• Type: Unperforated
• Inside Diameter (ID): 375mm
• Outside Diameter (OD): 426mm
• Length: 6 metres
• Material: HDPE
• Pipe Construction: Corrugated outer wall and smooth inner wall
• Pipe Ends: Plain ended
• Compliance: HAPAS/BBA approved

Product Details

Unperforated twinwall pipes are designed with solid walls, meaning that they don’t have little holes in their dwells, unlike perforated twinwall. This makes them suitable for use as filter drains, safely transporting collected surface water to a discharge point without letting the water leak out.

The twin extrusion manufacturing process used to create these pipes gives them a corrugated outer wall, making them more resilient to external pressure and weight loads, and a smooth inner wall to assist hydraulic flow and minimise silt build-up by covering the internal dwells of single-wall corrugated pipes.

Twinwall pipes typically weigh less than 6% of the equivalent size of concrete pipe, while still retaining a strength and durability sufficient for most drainage applications. This lightweight design makes them easier to transport and safer to handle on site.

Applications

Twinwall pipes of this diameter are most commonly used in:

• Road drainage
• Highways drainage

Compatibility

• This pipe is rigid, not flexible, and is intended for use with a 375mm twinwall coupler to join two lengths of pipe together.
• JDP offers a full range of compatible 375mm twinwall fittings and accessories, including fabricated fittings manufactured in-house.
• For a watertight system, remember to use twinwall ring seals (two per join).
• Not suitable for foul/adoptable sewer drainage pipe. View our ULTRA3 range range for suitable options.

Installation Advice

Twinwall pipes are suitable for installation in a wide range of soil conditions and can be easily cut on site using conventional hand tools. Where site modifications are required, pipes should be cut square between corrugations for best results.

For more installation advice, read our "How to install a Twinwall Drainage System" article.

Important Information

These twinwall pipes are manufactured from HDPE and comply with HAPAS BBA requirements.