Brett Martin 110mm/82.4mm Air Admittance Valve

Key Features & Benefits

• Dual Compatibility: Connects to both standard 110mm soil pipes and 82.4mm push-fit systems.

• Odour Control: Automatically admits air under suction while keeping dangerous sewer gases contained inside the pipe.

• Easy Push-Fit Installation: Quick rubber ring-seal joint requires no solvent weld glue.

• Durable Construction: Made from high-grade PVCu built to withstand thermal expansion and domestic waste effluent.

• Compliance Ready: Designed for internal soil pipe applications to meet Building Regulations 

Prevent foul drainage odors and balance internal pipe pressure with the Brett Martin 110mm / 82.4mm Air Admittance Valve (BS487).Engineered for internal waste and soil pipe installations, this universal Durgo-style valve opens automatically under negative pressure to admit fresh air into the drainage stack, preventing trap syphonage without requiring roof penetration.

Equipped with a push-fit ring seal design, it creates a secure, leak-free joint compatible with standard 110mm soil pipes as well as 82.4mm (3-inch) systems.Manufactured from lightweight, UV-resistant PVCu, the BS487 valve is ideal for home refurbishments, multi-story plumbing, and tight internal soil pipe runs.

Plumber’s Tip: Position the valve vertically above the highest flood level of any connected appliance (e.g., sink or toilet rim) to guarantee optimal air flow and prevent waste backflow into the valve mechanism.

Technical Specifications

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