Brett Martin 45° triple socket Branch Twinwall with Seals

This is a 45° twinwall junction / branch fitting from Brett Martin, designed for use in surface‑water / land‑drainage systems using twinwall drainage pipe. It’s part of Brett Martin’s “Twinwall Multi‑Fittings” range, which covers nominal pipe diameters of 150 mm, 225 mm and 300 mm. The junction comes with seals included — no need to order sealing rings separately (for the nominal sizes covered).

Key Specifications & Construction

• Material: Polyethylene (PE), using rotational moulding for strength and consistency.

• Design: Ribbed/twinwall outer body — this provides structural rigidity and compressive strength, helping the fitting resist deformation under load.

• Internal bore: Smooth inner wall for efficient hydraulic flow.

• Socket type: Triple‑socket junction (i.e. branch where three twinwall pipes meet: main run + branch at 45°) for the standard “equal-branch” 45° version; other variants in the Twinwall range may include reducing branch versions.

• Compatibility: Fits BBA‑approved twinwall PE drainage pipe (150, 225, 300 mm). The whole system (pipe + fittings + seals) is covered under BBA certificate 10/H168.

• Durability & resistance: Resistant to naturally occurring chemicals present in soil — suitable for typical drainage installation environments.

• Weight & ease of installation: Being polyethylene twinwall, the fitting (and the associated pipework) is much lighter than traditional concrete drainage — easier to handle and safer on site.

• Intended use / applications: Designed for surface‑water drainage systems — e.g. land drainage, highway drainage, agricultural drainage, rail/airport drainage, landfill drainage, culverts, carrier drains etc.

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