The B&B Nautilus P3 is a compact, colour-coded RV water-management panel. Its factory parts illustration identifies separate diverter-valve assemblies behind the red, green, white and blue handles, together with the city-water connection, faucet and pump switches. The P3 94145 is a different panel from the larger Nautilus P1.
See the corresponding water-system parts
Select a photograph to open the matching NewRVParts listing. Other factory parts remain identified by their original manufacturer numbers in the tables.
94145 — B&B Molders Nautilus P3 water-management panel, polar whiteComplete Nautilus P3 panel, not a P1 replacement
94136 — B&B Nautilus two-way diverter valve assemblyUsed for P1 black handle and P3 green handle
94140 — Nautilus white quick-disconnect exterior faucetWhite faucet for compatible P1/P3 panel
94210 — B&B polar-white city-water check valveWhite water inlet/check-valve component, 1/2-inch MPT
P3 white water-management panel — numbered factory service parts
| Drawing no. | B&B part | Factory-identified component |
|---|---|---|
| 1 | 94382 | Red pump indicator light |
| 2 | 94383 | White pump switch |
| 3 | 94380 | Illuminated red/white rocker switch |
| 4 | 94148 | Green operating handle with screws |
| 5 | 94368 | Red operating handle with screws |
| 6 | 94369 | White PW operating handle with screws |
| 7 | 94367 | Blue operating handle with screws |
| 8 | 94136 | Diverter operated by green handle |
| 9 | 94389 | Diverter operated by red handle |
| 10a | 94387 | Combined white/blue-handle diverter |
| 10b | 94388 | Handle spacer used with green, white and blue handles |
| 10c | 94386 | Diverter spacer used with 94390 and 94136 |
| 11 | 94140 | Quick-disconnect exterior faucet, white |
| 12 | — | Component identified as not separately replaceable |
| 13 | 94210 | Polar-white city-water check-valve connection |
| 14 | 94385 | City-water connection retaining clip |
P3 controls and service identification
| Function or connection | Purpose |
|---|---|
| City-water supply | Routes suitably regulated outside pressurized water directly to fixtures |
| PowerFill fresh tank | Directs outside freshwater into the onboard holding tank |
| Dry camping | Draws water from the onboard freshwater tank by pump |
| Sanitize / siphon fill | Allows the pump to draw from a container and fill the freshwater tank |
| Winterize | Routes approved antifreeze into plumbing lines without filling the freshwater tank |
| Pump switch and indicator | Controls and indicates operation of the RV's 12V water pump |
B&B's original illustrated reference
The manufacturer's drawing identifies the actual valve and fitting arrangement for this panel family.
View the original manufacturer's diagram
Open the PDF separately on a phone to enlarge the controls and labelled components.
Before ordering a replacement
The green-handle P3 diverter is 94136, but the P3 red-handle diverter is 94389, and the shared white/blue-handle diverter is 94387. Those components must not be replaced using the P1 94135 or 94137 numbers merely because the handles look similar. The B&B catalog also lists separate spacers beneath callout 10. The original instructions warn that depressing the city-water check valve while pressure remains in the line can damage it.