94251 — White keyed gravity water-fill hatch
View 94251 productB&B 94251/94252 Keyed RV Gravity-Fill Hatches: Doors & Parts
The B&B Molders 94251 polar-white and 94252 black gravity-fill hatches cover a larger rectangular RV wall opening than the compact 94249/94250 models. Each has a keyed exterior door that protects a barbed freshwater fill spout and vent connection. The two sizes of gravity-fill hatch are not interchangeable based on colour alone.
Identify the hatch by original part number
| Aftermarket part | Finish | Original factory key versions | Wall opening |
|---|---|---|---|
| 94251 | Polar white | 301-037-00059 (391 key); 301-037-00025 (751 key) | 4¾ × 4¼ in |
| 94252 | Black | 301-037-00055 (391 key); 301-037-00027 (751 key) | 4¾ × 4¼ in |
The factory specifies a 6½ × 6-inch outside frame for this pair. Confirm the orientation of the cutout, the hinge and the mounting holes. Check that the replacement frame covers the previous opening and fastener area.
Keyed door and frame
Protects the gravity-fill connection and covers the 4¾ × 4¼-inch wall opening.
Water-fill spout
Barbed connection for a 1¼- or 1⅜-inch freshwater tank-fill hose.
⅜-inch tank vent
Separate vent-hose connection for the tank.
Bayonet cap and strap
Removable closure for the fill spout; available separately in white or black.
Component functions shown for identification; the boxes do not represent the factory drawing's physical layout.
Find a matching service component
| Part | Polar-white version | Black version |
|---|---|---|
| Complete keyed hatch | 94251 | 94252 |
| Replacement outer door | 94180 | 94181 |
| Bayonet fill cap and strap | 94243 | 94244 |
| Water-fill spout, cap and strap | 94245 | 94246 |
B&B's original parts list associates the 94180/94181 doors with this keyed gravity-fill hatch family. They replace the exterior door only—not the frame, latch cylinder or water-fill spout. Confirm the existing hinge, key and hatch arrangement before ordering a door.
Product photographs for each assembly
View 94251 product94252 — Black keyed gravity water-fill hatch
View 94252 product94180 — White replacement gravity hatch door
View 94180 product94181 — Black replacement gravity hatch door
View 94181 product94243 — White gravity-fill cap and strap
View 94243 product94244 — Black gravity-fill cap and strap
View 94244 product94245 — White gravity-fill spout, cap and strap
View 94245 product94246 — Black gravity-fill spout, cap and strap
View 94246 productBefore replacing your gravity-fill hatch
- Measure the original wall cutout and outer trim; identify this larger hatch rather than the compact 94249/94250 design.
- Match the 391-key or 751-key version if retaining keyed-alike operation matters.
- Check the original fill hose, vent hose and available clearance behind the hatch.
- Use the RV manufacturer's mounting and weather-sealing procedure, keeping the tank vent clear.
Manufacturer illustration and model reference
Manufacturer references: B&B Molders' gravity water hatch specifications and the original B&B illustrated parts catalog (PDF).
For the smaller 4⅜ × 3⅛-inch cutout, see the compact keyed gravity-fill hatch guide. For a 3½-inch round cutout, see the round gravity dish guide.
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