Could this be used for a washing machine trap?

No, this is 11/4” size for basin. For kitchen trap you need WV-1 . Which is 11/2” size. Thanks

Is one and a quarter 32mm

Fits one and a quarter basin waste threaded outlet and I have connected to 32mm waste pipe, hope that answers the question. Works great by the way.

Can I use this to connect to a 40mm pipe? Thank you

NO, this one connects to 32mm pipe, (for bathroom/cloakroom sinks) you need:- McAlpine 1-1/2" Bath Space Saver Bath Waste Trap Self Closing Valve WV-1 This one which fits 40mm pipe (as it says in its description

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Description

🚿 Compact power, zero odour – the smart trap your basin deserves!

DURABILITY MEETS DESIGN - Lightweight yet robust, this trap is engineered to last, ensuring long-term reliability in high-use environments.
MAXIMIZE YOUR STORAGE SPACE - Compact 62mm height fits seamlessly under any basin cabinet, freeing up valuable room for your essentials.
MAINTENANCE WITHOUT THE MESS - Clean effortlessly without disassembly—just remove the split pin and rinse the membrane for a fresh, clog-free trap.
FLEXIBLE PLUMBING MADE SIMPLE - Built-in air intake valve eliminates the need for secondary ventilation, giving you more freedom in pipe layout.
ODOUR FREE FRESHNESS GUARANTEED - Innovative self-closing membrane blocks foul smells and sewer gases, keeping your cloakroom hygienic and inviting.

The McAlpine WHB-1 is a compact 1¼" self-closing basin waste trap designed to save space and prevent odours with its innovative membrane valve. Its 62mm height fits neatly under basins, while the self-sealing mechanism blocks sewer gases without needing a water seal, eliminating evaporation issues. The trap also features an integrated air intake for flexible plumbing layouts and can be easily cleaned without full disassembly, making it a hygienic, durable, and maintenance-friendly solution for cloakrooms and basins.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Manufacturer	McAlpine
Part Number	WHB-1
Product Dimensions	5.8 x 13.8 x 13.8 cm; 110 g
Item model number	WHB-1
Colour	White
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No
Battery description	Not Included
Item Weight	110 g

McAlpine 1-1/4" Self Closing Space Saver Basin Waste Trap WHB-1 | Compact Anti-Odour Trap for Cloakrooms & Basins | Horizontal Outlet | Hygienic, Durable Design

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