McAlpine STW7-M Chrome Domed Shower Waste Trap — 50mm Hole Mushroom Cap

McAlpine STW7-M Chrome Domed Shower Waste Trap — 50mm Hole Mushroom Cap

Features

This genuine McAlpine shower waste trap is a premium plumbing assembly designed for low-profile shower installations utilizing a standard 50mm waste hole. Bearing the manufacturer part number STW7-M, this space-saving component features a striking, high-shine 85mm domed mushroom flange made from polished chrome-plated stainless steel. Engineered with a compact 95mm under-tray height and a shallow 19mm water seal, it is ideal for narrow floor voids where joist depth is heavily restricted. The 1.5-inch universal outlet offers flexible connections to standard waste pipe sizes (40mm-43mm). Despite its compact size, it runs at a swift 50L/min flow rate, allowing heavy water volume to discharge without slow-draining pooling.

• Genuine McAlpine professional plumbing hardware proudly manufactured in the UK
• Stunning 85mm chrome-plated stainless steel mushroom dome for a high-end look
• Compact 95mm under-tray footprint fits narrow structural joist spaces with ease
• Designed specifically for shower trays with a standard 50mm waste hole
• Fast-flow system discharges 50 litres of water per minute to eliminate pooling
• Removable waste grid and internal dip tube allow swift hair removal from above
• Versatile 1.5″ universal compression outlet matches standard 40mm-43mm waste pipes
• Durable polypropylene body safely handles harsh chemical tile cleaners and thermal expansion

Technical

• Brand: McAlpine
• Part Number: STW7-M
• Tray Hole Compatibility: 50mm Diameter Waste Hole
• Flange Type: Domed Mushroom Cap
• Flange Size: 85mm Overall Width
• Flange Finish: Chrome-Plated Stainless Steel
• Overall Under-Tray Height: 95mm
• Water Seal Depth: 19mm (Shallow Run)
• Outlet Connection: 1.5″ BSP Thread / Universal Compression Fit (40mm-43mm pipes)
• Flow Rate: 50 Litres per Minute (Tested under constant 120mm head)
• Material: Rigid Polypropylene (Body) and Stainless Steel (Cover)
• Certification: Conforms to BS EN 274-2:2002 (Clause 5)

Details

Fitting a standard deep-bodied waste into a tight floor void with restricted depth is incredibly annoying. Consequently, installers often carve out huge sections of structural wooden joists or raise the entire shower tray, ruining a sleek, flush bathroom layout. Furthermore, cheap generic low-profile traps significantly choke drainage flow. As a result, you find yourself standing ankle-deep in wastewater while soapy scum overflows your tray lines and strains your floor seals.

Fortunately, installing this authentic McAlpine shower waste trap completely solves these space and flow restrictions. Specifically, the compact 95mm depth fits cleanly beneath low-slung trays without forcing structural modifications. Additionally, the premium interior hydraulics clear a swift 50L/min to handle modern high-pressure shower systems effortlessly. Therefore, you get an exceptionally clean, high-shine chrome finish that keeps your tray bone dry and perfectly draining.