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Optimized Flow Dynamics: The 87.5° sweeping long radius ensures exceptionally smooth waste transitions, lowering the risk of backflow or sediment build-up compared to standard short bends.
Advanced Captive Lip Seal: Specially engineered combined lip and compression seals guarantee a water-tight fit that stays locked in place during pipe insertion, entirely eliminating seal displacement.
Two-Way "Rest" Design: Built structurally to handle load-bearing transitions, making it ideal for support at the bottom of a vertical vertical drop before moving to horizontal underground lines.
Exceptional Durability: Manufactured in the UK from high-grade, impact-resistant PVC-U to resist ground movement, thermal changes, and soil chemicals.
Full Compliance: Kitemarked and fully certified to BS EN 1401-1 and manufactured under ISO 9001:2015 quality management.
The Brett Martin B4131 110mm 87.5° Long Radius Rest Bend is a premium underground drainage fitting engineered to provide a smooth, sweep-style directional change at the base of soil stacks or deep drainage drops.Featuring an extended long radius to drastically reduce the risk of blockages, this double-socket fitting utilizes Brett Martin’s market-leading captive lip seal system for a secure, leak-free, and easy-to-install connection.
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Technical Specifications Table
Feature
Specification
Manufacturer
Brett Martin
Product Code / MPN
B4131
Diameter
110mm (4 Inch)
Bend Angle
87.5°
Bend Type
Long Radius Rest Bend (2-Way)
Connection Type
Double Socket (Push-Fit with Captive Seal)
Material
PVCu / PVC
Colour
Terracotta
Standards & Approvals
BS EN 1401-1 / ISO 9001:2015
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