WHALE Watermaster High Flow Pump Assembly & IC Controller. The water system upgrade caravanners have been waiting for! Watermaster IC Intelligently Controls the submersible pump, for trouble-free operation and peace of mind. Never adjust your pressure switch again!* Stops the pump pulsating at high voltages. Stops the pump running continuously at low voltages. Detects when the water container has run dry and turns pump off. A Surge damper no longer required. Protects and prolongs the submersible pump. Helps lengthen battery life. Built-in fault diagnostics system. Service free, one-step caibration process. Easily retro-fitted. *WHALE Watermaster IC is compatible with a WHALE Watermaster pressure switch socket and a WHALE Watermaster High-Flow pump only.