Brett Martin 300mm 45 Degree x 225mm Junction

• Size / Configuration: Main run nominal diameter = 300 mm, branch nominal diameter = 225 mm, branch angle = 45°.

• Type: Triple-socket branch (i.e., a three-way fitting: one inlet, one outlet continuing the 300mm main run, and one branch of 225mm at 45°) in a Twinwall drainage system.

• Material: High-density polyethylene (HDPE) Twinwall pipe/fitting system (corrugated outer, smooth bore inner) for surface water drainage. (General specification for Brett Martin Twinwall range)

• Certification / Standards: The catalogue lists this and other similar fittings under the “Junctions BBA Cert 10/H168†” for 150mm–300mm diameter range.

• 300mm 45 Degree x 225mm Junction is supplied with seals.

• Unequal branch diameter: Allows a branch of 225 mm off a main 300 mm run, which offers flexibility in network layout where the branch need not be full size.

• 45° angle branch: The branch takes off at a 45° angle rather than 90°, which tends to give smoother flow transitions, less hydraulic disturbance than a sharp right‐angle.

• Triple socket design: Simplifies connection – three sockets (one for main inlet, one for main outlet, one for branch) facilitating installation in a Twinwall pipeline.

• Lightweight, strong Twinwall construction: Since it is HDPE Twinwall, it is much lighter than comparable concrete fittings, easier to handle, and offers excellent chemical resistance and durability in underground surface-water drainage applications.

• BBA approved range (150-300mm): The listing under Brett Martin’s catalogue suggests this diameter/branch combination falls into their BBA-certified bracket (for 150-300mm) which gives confidence for spec’ing on adoptable drainage and civil works.

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