McAlpine Space Saving Hand Basin Valve 1 1/4" White WHB-1

The McAlpine WHB-1 Space Saving Hand Basin Valve delivers innovative waste management through an internal membrane system that opens under water pressure to allow free discharge flow. This 1 1/4" valve then closes automatically to prevent foul odours and sewer gas from entering the property. Engineered without a traditional water seal, the membrane seal remains closed at all times when not in use, eliminating the risk of dry-out through evaporation or infrequent usage. This design provides reliable odour protection regardless of installation conditions. The valve incorporates air admittance functionality, drawing air into the discharge waste pipe when negative pressures occur. This eliminates the requirement for secondary ventilation pipework, offering greater flexibility in plumbing design while maximising usable storage space below the basin. Features & Benefits: Designed to maximise storage space below the basin within cupboards and furniture units. Internal membrane seal prevents d