Valterra RV Gravity and City Water Fill Inlet with Check Valve — Black low‑profile, UV‑stabilized

The Valterra Black Gravity/City Water Fill Dish is a two‑function RV and marine inlet that accepts gravity fill or a garden‑hose city water hookup and includes a built‑in check valve to prevent backflow.

This low‑profile inlet combines a gravity tank fill opening with a separate threaded city‑water connection, so you can top up your fresh water tank or connect to campground water without swapping components. Made from UV‑stabilized plastic and sized for common hose and pipe fittings, it fits cutouts about 5 3/4" by 3 3/4" and provides an air‑vent connection and screened opening to help prevent debris entry.

How does this inlet let me use both gravity fill and city water?

The unit features two distinct ports: a large gravity fill opening that accepts 1 1/4" to 1 3/8" ID hose and a threaded city water inlet for a 1/2" pipe fitting. You choose gravity fill for tank refilling or screw in the threaded fitting to use campground water pressure.

• Gravity port fits standard 1 1/4"–1 3/8" ID hoses for slow fill.
• City port accepts 1/2" NPT threaded fittings for pressurized water.
• Dual function avoids extra external fittings or adapters.

What does the integrated check valve do and why is it useful?

The built‑in check valve prevents backflow from the inlet into the outside hose or supply line, reducing cross‑contamination risk when switching between tank fill and city water. It keeps water flowing only inward to your tank when gravity filling and helps protect campground plumbing when hooked up to pressurized supply.

• Automatic one‑way valve prevents reverse flow to external hose lines.
• Protects both your water tank and campground plumbing from contamination.
• Sealed design requires no additional external valves for basic backflow protection.

What are the dimensions and mounting requirements for installation?

The outer housing measures approximately 7 9/16" wide by 5 5/16" tall, while the necessary cutout or rough opening is about 5 3/4" by 3 3/4". The inlet accepts common hose sizes and includes a screened air vent connection for a 1/2" ID hose to help equalize pressure during fills.

• Overall housing: 7 9/16" wide x 5 5/16" tall.
• Rough cutout: roughly 5 3/4" x 3 3/4" for flush mounting.
• Air vent connection fits 1/2" ID hose with screen to block debris.

What materials and fittings are supported for durability and compatibility?

Constructed from UV‑stabilized plastic, the inlet resists sun damage and cracking on exterior RV and marine panels. It works with standard hoses and pipe fittings used for recreational vehicles, minimizing the need for custom adapters.

• UV‑stabilized plastic resists fading and weathering.
• Compatible with 1 1/4"–1 3/8" ID hoses for gravity fills.
• Accepts 1/2" threaded pipe fittings for city water connections.

Who is this for: The Valterra Black Gravity/City Water Fill Dish is designed for RV owners, trailer utilities technicians, and marine vessel operators who want a compact, dual‑function inlet with built‑in backflow protection. It suits anyone replacing an exterior water inlet or adding a clean, weather‑resistant connection that accommodates both slow tank fills and pressurized campground water without extra valves or fittings.