McAlpine T12A-3 Straight Waste Extension Piece — 1.5″ x 3″ Threaded Spigot

McAlpine T12A-3 Straight Waste Extension Piece — 1.5″ x 3″ Threaded Spigot

Features

This genuine McAlpine T12A-3 trap waste extension is a trade-quality problem-solving fitting designed to vertically extend a standard plumbing outlet by exactly 3 inches. Built specifically for kitchen sinks, baths, and shower wastes, this high-grade white polypropylene spacer features identical 1.5″ BSP threads on both ends (female running nut on top, male spigot on the bottom). It provides a solid, rigid 75mm extension piece that bridges significant distance gaps, allowing existing traps to connect effortlessly to deeply recessed sinks or raised appliance units without the need to tear out and rebuild your entire drainage pipe layout.

• Genuine McAlpine fitting delivers professional, trade-tested reliability
• Provides a generous 3-inch (76.2mm) vertical drop extension to clear alignment gaps
• Standard 1.5″ BSP threads fit kitchen sinks, baths, and shower waste units
• Features a captive female top nut coupled with a male bottom output thread
• Heavy-duty white polypropylene construction resists hot water and harsh cleaners
• Supplied pre-fitted with a premium rubber sealing washer for an instant watertight lock

Technical

• Brand: McAlpine
• Part Number: T12A-3
• Product Type: Straight Waste Thread Extension Piece / Spacer
• Extension Length: 3 Inches (76.2mm)
• Thread Size: 1.5″ BSP (Fits standard 40mm / 1.5-inch UK waste fittings)
• Thread Gender: Female Top Nut x Male Bottom Threaded Outlet
• Material: Premium Polypropylene (White Plastic)
• Inclusions: Extension Body, Integrated Sealing Washer
• Suitability: Domestic Kitchen Sinks, Standard Baths, and Shower Wastes

Details

Major plumbing upgrades often leave a massive height gap underneath your sink or bath. For instance, deeper basins cause your original 1.5″ trap to sit a full three inches too low. Because rigid plastic pipework cannot stretch, forcing the joints together puts severe stress on the threads. As a result, the plastic nuts warp and leak water inside your cabinets. Thus, redoing the entire waste run just to bridge a 75mm gap becomes an expensive, time-consuming hassle.

Fortunately, this genuine McAlpine T12A-3 trap waste extension solves these large vertical gaps instantly. This fixed 3-inch spacer screws directly onto your waste outlet thread. Then, it safely lowers the connection point to meet your trap perfectly. Additionally, the pre-installed rubber washer creates a tight compression seal without messy silicone or plumbing tape. Consequently, you preserve your original under-sink configuration and prevent costly leaks.