Viva Sanitary 1 1/2" (40mm) Magna Self-Sealing Waterless Waste Valve & Adaptors - WTSTC40

The WTSTC40 Magna valve is a non-return valve with an internal membrane. The valve opens to allow water to be discharged, then automatically closes to prevent foul smells and sewer gases from entering the building. This model is particularly suitable for installation under baths and kitchen sinks.