38mm RV Yacht Water Tank Inlet Cover – Plastic Boat Accessory

38mm Water Tank Cover & Water Inlet Port for RV, Yacht & Boats

Keep your vessel or recreational vehicle's water system sealed and protected with this durable 38mm plastic water tank inlet cover. Designed for use on RVs, yachts, sailboats, and other marine or recreational watercraft, this inlet cap provides a secure, weather-resistant closure for your water tank or refueling port — helping prevent contamination, leaks, and debris entry during travel or docking.

Key Features

• Universal 38mm Fitting: Standardized diameter fits most common RV and marine water tank inlets and refueling ports.
• Durable Plastic Construction: Lightweight yet sturdy material built to withstand marine and outdoor environments.
• Secure Cover Design: Snug-fitting cap helps keep your water inlet protected from dirt, insects, and moisture when not in use.
• Wide Compatibility: Suitable for RVs, motorhomes, yachts, sailboats, fishing boats, and other vessels requiring a standard water or fuel inlet cover.
• Easy Installation: Simple fit-and-click or screw-on design — no special tools required.
• Compact & Lightweight: Easy to store as a spare on board or in your RV kit.

Specifications

• Diameter: 38mm
• Material: Plastic
• Application: Water tank inlet / Refueling port cover
• Compatible With: RV, Yacht, Boat, Marine Vessel
• Quantity: 1 piece
• Made in: Mainland China

What's in the Box?

• 1 × 38mm Plastic Water Tank Inlet Cover

Whether you're outfitting a new vessel or replacing a worn cap, this water inlet cover is an essential and affordable spare to keep on hand for any RV or marine water system.

For safe boating practices and maintenance guidelines, visit the U.S. Coast Guard Boating Safety Division. For more on recreational vehicle and marine standards, the U.S. Consumer Product Safety Commission (CPSC) provides helpful consumer safety resources.

Frequently Asked Questions

Q: What is the diameter of this water tank inlet cover?

A: This water tank cover features a standard 38mm (approximately 1.5 inch) diameter, compatible with most common RV, yacht, and boat water inlet and refueling ports of that size.

Q: Is this inlet cover suitable for both RVs and marine vessels?

A: Yes! This 38mm plastic water inlet cover is designed for a wide range of applications including motorhomes, RVs, yachts, sailboats, and fishing boats — anywhere a standard-size water tank or fuel port cap is needed.

Q: Is the material durable enough for outdoor and marine use?

A: The cover is made from sturdy plastic that is lightweight and resistant to general outdoor conditions, making it well-suited for marine deck environments and RV exteriors. For prolonged exposure to harsh saltwater environments, regular inspection and replacement is recommended.

Q: Where is this product made?

A: This product is made in Mainland China.