RV Gravity Water Filling Port White 80mm Hole Size 38mm Inner Diameter External Water Pipe Inlet Accessories for Recreational Vehicle Water Tank Refill System Component
RV Gravity Water Filling Port White Inlet for Recreational Vehicle Water Tank Refill

This RV gravity water filling port provides a straightforward solution for refilling your recreational vehicle's water tank. Designed as a dedicated water inlet, it uses a gravity-fed system to allow water to flow into the tank without requiring a pressurised pump connection. The white-coloured port is intended for standard mounting on RV exterior panels, offering a clean and practical way to manage water supply during camping trips, road stops, or storage periods. Whether you are outfitting a new build or replacing a worn component, this port delivers the essential function of a reliable water fill point.
Features and Construction

The water filling port is built around specific measurements to match common RV panel cutouts and standard external water hoses. Its construction focuses on the practical task of transferring water into the tank efficiently through a gravity feed.
Material and Build
The port is manufactured from a plastic or composite material, chosen for its resistance to corrosion and ability to withstand outdoor exposure on an RV exterior. The white colour helps it blend with typical RV panels and avoids drawing attention to the inlet. While specific material grades are not detailed, the construction is intended to handle regular water contact and UV exposure during travel and parking.
Size and Practical Fit
Two key measurements define the fit of this component. The hole size is 80mm, which corresponds to a standard panel cutout for many RV water ports. The inner diameter of the external water pipe connection is 38mm, matching the diameter of common RV water hoses. These dimensions help ensure a straightforward installation process provided your RV panel has the correct pre-cut opening.
Uses and Placement

This water filling port is designed exclusively for use on recreational vehicles, including caravans, motorhomes, campervans, and other mobile living spaces. Its placement and function are centred on the need to refill a fresh water tank in a simple, low-pressure way.
Event or Professional Use
For caravan park setups, campsite hookups, or professional RV servicing, the gravity water port allows you to connect a standard hose and let water flow by gravity into the tank. This avoids the need for a pressurised water connection and can be particularly useful when filling from a portable water container or a low-pressure standpipe. The port gives your water system a dedicated, easily accessible entry point.
Everyday Home Use
During everyday RV ownership, this port simplifies the routine of topping up the fresh water tank before a trip or after returning home. You can connect your garden hose directly to the 38mm diameter inlet without adaptors, provided the hose matches the inner diameter. The gravity feed operates without pumping, making the filling process quiet and straightforward at home or on the road.
Benefits and Buying Value

While this is a simple component, its practical benefits come from its specific sizing and dedicated function as a gravity-fed inlet. It solves the basic need of transferring water into an RV tank without complexity.
Reuse and Low Maintenance
The port is designed for repeated use over the life of the RV. Its material construction requires only occasional cleaning to remove dirt or debris from the inlet. There are no moving parts, seals, or electronics to maintain, reducing the need for ongoing servicing. The white finish is easy to wipe clean and will not show dirt as readily as darker colours.
Why Choose This Product
Choosing this water filling port means selecting a component with specific measurements that match standard RV plumbing. The 80mm hole size and 38mm inner pipe diameter are common specifications that simplify a replacement or new install. The gravity-fed design works without a pump, reducing parts complexity. For a basic, functional, and correctly sized water inlet for your recreational vehicle, this port covers the essential requirement without unnecessary features.
