Macerator pumps and black water discharge Gulper 320 12 V 19 L/min Black Water Drain Pump - Whale FA4243 €234.50 This pump provides the same reliability as the Gulper 220 with 35% more flow rate. Improved features compared to the 220:1) patented EZI-CLAMP that allows the head to be oriented 360° without the risk of losing screws;2) 3-foot design for quicker and easier installation;3) anti-vibration rubber support band;4) hose holder for Ø 25 and 19 mm hose. Add to cart