Valterra Gravity/City Water Fill Check Valve - White RV inlet with backflow protection, UV-stabilized

The Valterra White Gravity City Water Fill Dish Check Valve is a combined gravity-fill and city-water inlet with a built-in backflow-preventing check valve for RVs, trailers, and boats.

This two-function inlet lets you fill your fresh water tank by gravity or connect a pressurized city water supply while protecting your tanks from backflow. Molded from UV-stabilized plastic, the unit fits a 5 3/4" x 3 3/4" rough opening and measures 7 9/16" wide by 5 5/16" tall for flush mounting. It includes a screened vent connection and accepts common hose and pipe sizes to integrate cleanly with typical RV and marine plumbing systems.

How do I connect the gravity fill and city water lines?

Installation separates the two functions: a gravity fill accepts a non-threaded hose for tank filling, while the city side uses a standard threaded connection for pressurized supply. Both connections are sized to work with common hose and pipe fittings so you can adapt existing plumbing.

• Gravity inlet fits 1 1/4" ID or 1 3/8" hose for direct tank filling.
• City water side connects to 1/2" threaded pipe fitting for pressurized hookup.
• Mounts in a 5 3/4" x 3 3/4" cutout; overall faceplate 7 9/16" x 5 5/16".
• Includes a 1/2" ID air vent connection with a removable screen.

What does the check valve do and why is it important?

The integrated check valve prevents pressurized city water from flowing back into the fill or tank lines, reducing the risk of cross-contamination between sources. It is a passive device that operates automatically whenever pressure differences occur between the inlet and the tank.

• Backflow prevention built into the city connection to protect supply and tank lines.
• No external valves required for basic backflow protection at the inlet.
• Simple maintenance: inspect and clean the vent screen and check valve area periodically.

What materials and durability features should I expect?

The unit is fabricated from UV-stabilized plastic designed to withstand sun exposure common in outdoor, marine, and RV installations. Its molding and fit dimensions are intended for flush exterior mounting and reliable seasonal use.

• UV-stabilized plastic resists fading and brittle failure from sunlight.
• Compact, low-profile face reduces snagging and improves aesthetics on exterior panels.
• Screened vent helps keep debris and insects out of the vent line.

How do I maintain or service the fill dish over time?

Maintenance is straightforward: periodically check the vent screen and the check valve area for debris, and verify hose and threaded connections remain tight and leak-free. Replace worn hoses and seals to preserve proper operation and water quality.

• Inspect the screened vent and clear sediment or insect debris as needed.
• Test threaded connections and hose clamps annually for leaks.
• Replace the inlet assembly if cracks, brittle plastic, or persistent leaks appear.

Who is this for: The Valterra White Gravity City Water Fill Dish Check Valve is suited for RV and trailer owners, boaters, or fleet operators who need a compact, combined gravity and city water inlet with built-in backflow protection. Choose this part when you want an easy-to-install, UV-resistant exterior inlet that fits standard rough openings and pairs with common hose and pipe sizes for straightforward plumbing integration.