Lockable RV Freshwater Gravity Inlet Filler Cap + 2 Keys
Lockable RV Freshwater Gravity Inlet Filler Cap + 2 Keys
Lockable RV Freshwater Gravity Water Inlet Filler Cap
Keep your RV's freshwater system secure and leak-free with this heavy-duty lockable gravity water inlet filler cap. Designed specifically for motorhomes, campers, and RVs, this replacement water inlet features a bayonet-style lid, integrated sealing rings, and comes with 2 keys so you always have a spare. Whether you're at a campsite or on the road, this sturdy plastic filler cap ensures your water supply stays clean, safe, and tamper-resistant.
Made in Mainland China.
Key Features
- Bayonet-Style Lockable Lid — Secure twist-lock design with 2 included keys for protected water access at any campsite.
- Leakproof Design — Built-in spring mechanism and dual sealing rings effectively prevent leakage and loosening during travel.
- Fast-Fill Air Vent — 0.3 in air vent allows faster water fill speeds without airlock buildup.
- Standard Barn Connection — Features a 1.6 in barn-style connection compatible with most RV freshwater hoses.
- Universal Door Panel Fit — Compatible with door panels 30–40 mm (1.18–1.57 in) thick.
- Durable Plastic Construction — High-quality, corrosion-resistant plastic built to withstand outdoor conditions and frequent use.
- Easy Installation — Installs with the included 3 screws; no special tools required.
Specifications
| Item Type | Water Filler Cap |
| Material | High-Quality Plastic |
| Color | Black |
| Air Vent Diameter | 0.3 in |
| Barn Connection Size | 1.6 in |
| Compatible Door Thickness | 30–40 mm / 1.18–1.57 in |
| Country of Origin | Mainland China |
What's in the Box
- 1 × Lockable Water Filler Cap
- 2 × Keys
- 3 × Mounting Screws
Please Note: New and old style variants of this product may be shipped; both are fully functional equivalents. Please ensure you are comfortable with this before ordering.
Helpful RV Resources
For safe drinking water practices while camping or traveling in your RV, visit the CDC Drinking Water While Traveling guidelines for tips on maintaining a safe freshwater supply on the road.
Frequently Asked Questions
Q: Is this RV water inlet filler cap compatible with all motorhomes?
A: This lockable freshwater inlet filler cap is designed to fit door panels with a thickness of 30–40 mm (1.18–1.57 in), making it compatible with most standard RVs, motorhomes, camper vans, and travel trailers. Always measure your door panel thickness before ordering.
Q: Does this water filler cap prevent leaks during travel?
A: Yes. The cap features an integrated spring mechanism and dual sealing rings that work together to create a tight, leakproof seal — even on bumpy roads. The bayonet-style locking lid adds an extra layer of security.
Q: How many keys are included with the lockable water inlet?
A: Each unit comes with 2 keys, so you have a backup readily available in case one is misplaced.
Q: How do I install the RV gravity water inlet?
A: Installation is straightforward. The package includes 3 mounting screws. Simply position the filler cap on your RV's door panel (30–40 mm thick), secure it with the provided screws, and connect your freshwater hose to the 1.6 in barn-style connection.