Make filling your motorhome fresh water tank effortless with our custom-designed water filler cap adapter. Effortless Handsfree FillingTired of holding the hose pipe in place or dealing with blowback while filling your water tank? This cap adapter locks directly into your motorhome inlet, allowing you to click your hose pipe straight into the integrated connector. Once attached, turn on the tap slowly and watch your onboard water gauge handsfree. Purpose-Built for Unvented SystemsDesigned specifically for Fiamma-style filler points featuring a 65mm external diameter, 33mm internal diameter, and two-prong locking mechanism. The adapter incorporates intentional air vents around the rim, allowing air pressure to escape freely from unvented water systems as the tank fills. Key Specifications & UsageCompatibility: Fits 65mm external / 33mm internal two-prong filler necksOperation: Static filling only (remove prior to driving)Materials: Durable, weather-resistant plastic Filler cap adapter only. Hose pipe and main electronic/vehicle water tank not included.