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

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

Features

This genuine McAlpine T28M-NRV 40mm waste non-return valve is an essential inline safety device designed to stop foul water from backing up into your fixtures. Featuring universal compression joints on both ends, it integrates into any standard 1.5″ trade-size drainage setup. It works brilliantly for protecting low-level shower trays, wet rooms, and kitchen appliances from main drain flooding. Because it utilizes a smart top-access screw cap design, you can inspect and clean out debris easily without cutting your pipework. This horizontal mechanical valve opens fully under normal flow and seals tight against back-pressures instantly.

• Genuine McAlpine T28M-NRV component delivers professional anti-backflow reliability
• Universal Multifit connections fit standard 40mm, 42mm, and 43mm waste pipes
• Essential protection for low-slung shower trays, baths, and kitchen sinks
• 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 Mechanical Waste Non-Return Valve (NRV)
• 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
• Suitability: Plastic pushfit, solvent weld ABS/PVC, copper, and lead pipes

Details

When heavy rainfall overloads a main drainage stack, or a clog forms down the line, dirty water seeks the path of least resistance. Unfortunately, this usually means raw sewage and greywater backs up straight through your low-slung shower tray or kitchen appliance drains, causing massive property damage. Furthermore, standard plumbing traps cannot stop backward pressure, meaning toxic sewer smells frequently seep into your home. Trying to solve this with specialized tools or permanent pipe glue is messy. This is because cheap inline check valves often clog with hair and require cutting out completely when they fail.

Fortunately, this genuine McAlpine T28M-NRV 40mm waste non-return valve resolves these backflow flooding hazards completely. Thanks to its precision internal flapper mechanism, water can only flow outward away from your property. Thus, any back-pressure from a blocked drain line forces the mechanical gate closed instantly, locking out wastewater. Additionally, the universal compression connections allow you to splice the valve straight into your existing 41mm to 43mm pipework without glues. Instead, you just hand-tighten the nuts down. Consequently, you achieve a serviceable, failsafe shield that keeps your home dry and odour-free.