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Simple system - Allows you to manage all grey waste on board through one thru-hull fitting. Resilient polyethylene one-piece molded tank designed to handle grey waste on board - ideal for use with Gulper Grey Waste pumps for unbeaten debris handling. Intelligent Control - sensor activates pump automatically to empty grey waste tank only when requiredRobust - enclosed housing with dual seal ensures the best component protection in the harsh grey waste environmentReliable - designed to reduce dirt and debris build-upCompatible - lid design allows retrofitting to existing Whale grey waste tank systemsSimple installation - two wires can connect to any 12 or 24V pump system, up to 20A, with no requirement for a relayInlets: 3/4" (2), 1" (3), 1-1/2" (3) Outlets: 3/4" (1), 1" (1)