WHALE Socket Motorhome Fill. Directly fill your on-board water tank with the Onboard Tank Fill Socket. The unique secure hose clip keeps the pump in place during filling. The tank fill design incorporates a lock to protect your water supply and a vent pipe to prevent airlocks. The Onboard Tank Fill Socket is suitable for use with any standard hose and should 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. Overall Size: 103mm (W) x 66mm (D) x 270mm (H) including Lid *Please note Lids Sold Separately. Cut out Size: 124mm (H) x 75mm (W) x 66mm (D). Plumbing Connection: Takes 40mm Hose: 80040 Clear 40mm id Spiral Convuluted Hose (30 Mtrs)