McAlpine T16 Trap Inlet Increaser Bush — 1.25″ Female to 1.5″ Male BSP

McAlpine T16 Trap Inlet Increaser Bush — 1.25″ Female to 1.5″ Male BSP

Features

This genuine McAlpine T16 trap inlet increaser is a professional plumbing bush designed to upsize small waste threads. It features a 1.25″ BSP female internal thread (measures approx. 42mm) that screws directly onto standard basin wastes. Then, it expands the outlet to a larger 1.5″ BSP male external thread (measures approx. 48mm). Consequently, this allows you to install a larger 40mm kitchen-sized trap onto a standard 32mm bathroom basin waste. This upgrade significantly improves drainage water flow rate and prevents common hair clogs.

Technical

• Brand: McAlpine
• Product Code: T16
• Product Type: Threaded Increaser Bush / Trap Inlet Reducer
• Internal Thread Size: 1.25″ Female BSP (Measures approximately 42mm)
• External Thread Size: 1.5″ Male BSP (Measures approximately 48mm)
• Material: Premium Polypropylene (White Plastic)
• Sealing Washer: Not included (Designed to utilize the washer supplied with your connecting trap)
• Suitability: Adapting small basin or bidet wastes to accept larger 40mm (1.5″) plumbing traps

Details

Standard bathroom basin wastes use a narrow 32mm (1.25″) thread layout, which easily clogs with soap scum and hair. Furthermore, if you are installing a high-volume tap or a busy commercial basin, this small pipe diameter simply cannot drain the water away fast enough. As a result, the basin fills up too quickly and risks overflowing onto your floor. However, trying to find a high-flow plumbing trap that screws directly onto a small 1.25″ thread is incredibly difficult because most high-capacity traps are built exclusively for larger 40mm (1.5″) kitchen pipes.

Fortunately, this genuine McAlpine T16 trap inlet increaser resolves these flow rate and connection limits perfectly. By threading directly onto your existing 42mm basin outlet, it instantly upsizes the connection to a wider 48mm thread face. Thus, you can seamlessly hook up a heavy-duty 40mm kitchen trap to your bathroom basin. Additionally, because the bushing uses an open, washer-free seating design, it relies entirely on your new trap’s rubber seal to create a watertight joint. Consequently, you achieve maximum drainage speed without buying an entirely new basin waste.