Shower Waste Non Return Valve 40mm — McAlpine T28M-NRV 1.5″ Universal Anti-Backflow Valve

Shower Waste Non Return Valve 40mm — McAlpine T28M-NRV 1.5″ Universal Anti-Backflow Valve

Features

This genuine McAlpine shower waste non-return valve is an essential safety device designed to stop foul water from backing up into low-profile shower trays. Featuring universal compression joints on both ends, it integrates into any standard 1.5″ trade-size shower drainage pipework. It works brilliantly for protecting wet rooms, low-slung showers, and bathroom fixtures from main drain flooding. Because it utilizes a smart top-access screw cap design, you can inspect and clean out hair or debris easily without cutting pipes. This horizontal valve opens fully under normal flow and seals tight against back-pressures instantly.

• Specially optimized to stop dirty backflow water from entering shower trays
• Genuine McAlpine T28M-NRV component delivers professional trade-quality reliability
• Universal Multifit connections fit standard 40mm, 42mm, and 43mm waste pipes
• Features a convenient top-access access cap for simple inspection and cleanout
• Tool-free nut and cone compression rings work seamlessly on all plastic pipe types
• Must be installed horizontally to ensure the internal flap seals correctly

Technical

• Brand: McAlpine
• Product Code: T28M-NRV
• Product Type: Horizontal Inline Shower Waste Non-Return Valve (NRV)
• Primary Application: Low-slung shower trays, wet rooms, and shallow bathroom drains
• Connection Size Compatibility: 40mm, 42mm, and 43mm Outer Diameter (OD)
• Trade Size Profile: Standard UK 1.5″ Domestic Waste Networks
• Installation Orientation: Horizontal runs only
• Material: Heavy-Duty Polypropylene (White Plastic Body)
• Sealing Mechanism: Internal Flapper Gate with Removable Carrier

Details

Low-profile shower trays sit incredibly close to the floor, making them highly vulnerable to drainage backflow. For example, if a blockage occurs down the main line or heavy rain overloads the stack, dirty waste water backs up into the lowest open outlet. Unfortunately, this means raw sewage and greywater can flood straight up through your shower drain, causing expensive bathroom water damage. Furthermore, cheap inline check valves trap hair constantly. As a result, they block your regular drainage flow and require cutting out your pipework completely just to clear the clog.

Fortunately, this genuine McAlpine shower waste non-return valve resolves these shower flooding hazards completely. Thanks to its precision internal flapper mechanism, water can only flow outward away from your shower tray. Thus, any reverse pressure from a blocked drain forces the mechanical gate closed instantly, locking out backing-up wastewater. Additionally, the universal compression connections allow you to splice the valve straight into your existing 41mm to 43mm pipework without glues. Consequently, the top-access screw cap lets you clear out hair easily, keeping your shower dry and odour-free.