The McAlpine WHB-1 Space Saver Self-Closing Waste Valve is a compact, high-performance waste solution designed specifically for wash hand basins where space is extremely limited. Unlike traditional traps, the WHB-1 uses a self-closing membrane valve to maintain a secure water seal, preventing foul odours from entering the room while allowing rapid discharge from the basin.

Its ultra-slim design makes it ideal for tight installations, under-sink furniture, cloakrooms, and commercial washrooms. Manufactured from durable polypropylene, the valve offers long-term reliability and resistance to soaps, detergents, and cleaning chemicals. The WHB-1 is fully compatible with standard 1½" waste connections and includes compression outlets for quick, leak-free installation.