McAlpine S31M 32mm – 36mm Multifit to 1 1/4″ BSP Male Threaded Coupling Adaptor Straight Connector

McAlpine S31M 32mm – 36mm Multifit to 1 1/4″ BSP Male Threaded Coupling Adaptor Straight Connector

Features

The McAlpine S31M Multi-Fit to Male Threaded Coupling Adaptor is a commercial-grade plumbing component designed to transition smoothly between plain-ended pipework and threaded fittings. It features a universal 32mm to 36mm Multi-Fit compression inlet on one end and a standard 1 1/4″ BSP male threaded outlet on the other.

Moulded from high-grade white polypropylene, this straight inline connector allows you to connect any 32mm, 34mm, or 36mm plastic or copper basin waste pipe directly into a standard 1 1/4″ female threaded socket or trap connection. It creates an absolute airtight and watertight seal without the need for solvent glue or specialised tools.

• Genuine McAlpine fitting delivers commercial-grade reliability and a guaranteed leak-free seal
• Universal Multi-Fit compression socket accepts any 32mm, 34mm, or 36mm outer diameter waste pipe
• Standard 1 1/4″ BSP male thread connects seamlessly to bathroom basin traps or female fittings
• Eliminates the need for messy solvent welding, making adjustments or future repairs simple
• Durable white polypropylene construction resists boiling water, impacts, and harsh household chemicals

Technical

• Component Type: Straight Male Threaded Adapter / Coupling Converter
• Inlet Connection: 32mm, 34mm, and 36mm Universal Multi-Fit Compression
• Outlet Connection: 1 1/4″ BSP Male Thread (Standard UK Bathroom Basin Size)
• Material: High-Grade Polypropylene
• Colour: White
• Inclusions: Pre-fitted internal rubber sealing ring, pressure washer, and compression nut

Details

When redesigning under-sink plumbing or hooking up unique vanity units, you frequently run into a mismatch where a smooth, plain-ended waste pipe needs to connect directly to a rigid, female threaded fitting. Trying to force non-threaded plastic pipe into a threaded socket is impossible, and trying to patch it together with tape or silicone always leads to slow, structural-damaging leaks inside your bathroom cupboards. Additionally, matching the pipe can be stressful since different brands use varying outer diameters between 32mm and 36mm.

The McAlpine S31M Coupling Adaptor completely solves this installation dilemma. Its universal compression end tightly clamps onto any 32mm, 34mm, or 36mm pipe line regardless of the brand, while the other end provides a perfect, solid 1 1/4″ male thread. It converts your smooth pipe into a threaded fitting in under a minute, giving you a clean, professional, and entirely watertight connection by hand.

Brand:

• McAlpine

MPN:

• S31M