Whale Watermaster Submersible Pump Kit 12VSimplifies the connection between an outside water container into the caravan Choice of flow rate to suit either a simple one or two outlet system with two or more outlets including a shower Incorporates an anti air locking pump The Whale Watermaster Exterior Water Pump is ideal when you are using an external water source. It can pump up to 15. 8L per minute and with its Easi Press Plug it simplifies the connection between an outside water container