WHALE Socket Motorhome Fill 12V. Unique 2 in 1 design includes a 12V pump power supply and Onboard Tank Fill all in one socket. The secure hose clip keeps the pump in place during filling. The Onboard Tank Fill + 12v Power Socket incorporates a lock to protect your water supply and a vent pipe ensuring the tank is vented at all times, preventing airlocks. This socket is suitable for use with any standard hose and is to be used with cold freshwater only. Slick design – uniform look on the vehicle's exterior walls. Comfortable to use. Waterproof protection. High quality satin finish UV stabilised to prevent damage from sunlight