GULPER 220 Shower Drain & Waste Water Pump Specially designed to pump waste water at outputs up to 14 litres (3.7 US gals) per minute. Quiet running with low power consumption. Large single diaphragm, with virtually non-choke valves & double outlet valve ensuring a continuous flow. No filter required, Will run dry without damage and pump a mixture of air and water, Self-priming up to 3 metres (10 ft). Easy to install in confined spaces with Multi directional head so Can be mounted almost anywhere.