A gravity water-fill dish lets you fill the RV's onboard fresh-water tank through a hose-connected spout. B&B Molders 94247 and 94248 are the polar-white and black round dishes. They share a 4½-inch outside face and a 3½-inch wall opening, but they are not pressurized city-water connectors.

Compare the round gravity-fill dishes

B&B model Finish Factory OEM number Opening / outer face
94247 Polar white 301-005-00024 3½-inch cutout / 4½-inch face
94248 Black 301-005-00027 3½-inch cutout / 4½-inch face
Gravity water-fill component identification
Bayonet cap and strap

Covers the exterior fill spout; the cap can be replaced without buying the entire dish.

Gravity-fill spout

Connects behind the dish to the freshwater tank's 1¼- or 1⅜-inch fill hose.

⅜-inch tank vent connection

Separate hose connection used to vent the freshwater tank while filling.

2½-inch spout depth

Factory-listed spout projection to check against space behind the RV wall.

Connection roles are simplified and are not a manufacturer exploded diagram or a pressurized-water plumbing schematic.

Cap only, or cap and spout?

Replacement part Finish What it replaces
94243 Polar white Gravity water-fill cap and retaining strap only
94244 Black Gravity water-fill cap and retaining strap only
94245 Polar white Gravity water-fill spout, cap and strap
94246 Black Gravity water-fill spout, cap and strap

If the existing spout is sound but the cap is missing, choose the cap-only component. If the molded spout is cracked or its hose connection is damaged, the matching cap-and-spout assembly addresses a different part of the installation.

Photographs and matching product links

Measure and inspect before installing

  1. Measure the wall opening and outer trim dimensions, and check the fastener positions.
  2. Confirm the fill hose is the diameter specified for the chosen spout and check the separate tank-vent hose.
  3. Inspect the original bayonet cap shape and retaining strap attachment before buying only a cap.
  4. Follow the RV manufacturer's sealing and freshwater sanitation instructions, and prevent tank overfilling.

Original factory part references

Manufacturer references: B&B Molders' gravity water dish specifications and the original B&B illustrated parts catalog (PDF).

If the RV uses a keyed rectangular water-fill hatch, compare the 94251/94252 hatch guide instead.

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