A replacement RV fresh-water inlet must fit the existing wall opening and connect to the correct plumbing. Some hatches offer a gravity opening for filling the onboard tank; others combine that opening with a separate pressurized city-water connector. Even Valterra hatches that look similar have different mounting sizes and inlet materials. The four exact part numbers below cover several common layouts, all in white.
| Part number | Inlet layout | Wall cutout (W × H) | Exterior size (W × H) |
|---|---|---|---|
| A01-2000VP | Gravity + city | 5-7/8 W × 4-3/4 H | 7-5/8 W × 6-1/2 H |
| A01-2001VP | Gravity + city | 5-1/2 W × 3-1/2 H | 7-1/2 W × 5-1/4 H |
| A01-2002VP | Gravity only | 4-1/4 W × 4-3/4 H or 4 W × 3 H | 6 W × 6-1/2 H |
| A01-2004VP | Gravity + city | 5-7/8 W × 4-3/4 H | 7-5/8 W × 6-1/2 H |
All dimensions above are in inches. The cutout is the opening through the RV wall; the exterior size is the face that covers it. Confirm both measurements on the existing installation, including screw locations, wall thickness and plumbing clearance.
The following is a general connection reference, not a brand-specific RV plumbing schematic. The actual route behind the hatch depends on how the RV manufacturer assembled its water system.
Remove the fill cap and introduce clean water at the gravity-fill port.
A matching flexible fill hose connects behind the inlet.
Water flows down the fill hose to the onboard tank.
A 1/2-inch vent connection provides an air path during filling.
Connect an appropriate drinking-water hose to the separate city-water port.
The hatch's rear 1/2-inch MPT fitting joins compatible RV plumbing.
The water supplies the RV's pressurized plumbing according to its installed valves and controls.
The city-water connection normally supplies the plumbing directly; it does not automatically fill the fresh-water tank. Some RVs have a separate fill-selector valve. A gravity-only A01-2002VP does not provide a city-water connection.
The lockable white hatch combines a gravity tank fill and a separate brass city-water inlet. This version includes mounting hardware and installation tape. Check the 5-7/8 × 4-3/4-inch opening and the two different water connections before replacing the original.
Connections: 1/2-inch MPT city-water fitting; 1-1/4-inch gravity barb; 1/2-inch vent
View A01-2000VP
A shallower rectangular white panel with separate gravity and city-water connections. It is not the gravity-only A01-2002VP. The outer face is 7-1/2 inches wide by 5-1/4 inches high; match the smaller opening and fitting arrangement before installing.
Connections: 1/2-inch MPT city-water fitting; 1-1/4-inch gravity barb; 1/2-inch vent
View A01-2001VP
A lockable gravity-fill-only hatch for compatible fresh-water tank hoses. Its two supported wall cutout sizes make it an option for replacing certain older gravity inlets, but it has no separate pressurized city-water connector.
Connections: 1-1/4-inch gravity-fill barb; 1/2-inch tank air vent
View A01-2002VP
A white lockable UV-stabilized plastic hatch for combined gravity and city-water service. It shares the cutout and exterior dimensions of A01-2000VP but uses a plastic rather than brass city-water fitting. Valterra lists mounting screws, putty tape and PTFE tape.
Connections: 1/2-inch MPT city-water connection; 1/2-inch tank vent
View A01-2004VPThese accessories are used at a compatible gravity-fill opening when filling a fresh-water tank; neither replaces the actual inlet hatch or acts as a city-water pressure regulator.
Fits a compatible gravity-fill opening, twists to secure and includes a manually operated on/off valve. Remove it promptly when the tank is full.
View A01-0035VP
A separate quick-fill pigtail for a gravity-fill opening. This version does not include a water shutoff; control the supply at the hose or faucet.
View A01-0030VPWhen using any fresh-water tank filler, stay with the RV while water is flowing. Turn off the supply promptly when the tank is full, and do not block or pressurize its vent. A city-water connection and gravity-fill spout are intended for different plumbing paths.
For factory photographs and exact part identification, compare Valterra's A01-2000VP brass-inlet hatch, A01-2001VP gravity/city inlet, and A01-2004VP plastic-inlet hatch. The A01-2002 family gravity hatch shows the different universal cutout pattern.
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