Mc Alpine Bath space saver with self-closing waste valve is made of polypropylene (PP) and includes 1½" x 1½" BSP x compression connections. The internal membrane opens under water pressure to allow discharge to flow freely and then closes to form a seal to prevent foul odour or sewer gas entering the building. The valve allows air to be drawn into the discharge waste pipe when negative pressures occur and eliminates the need for secondary ventilation to the discharge pipework. This allows for g

Brand Name	McAlpine