Sealand 385311423 Vacuflush SW Rebuild Kit 12V
If your marine or RV toilet pump has started thumping loudly every time you flush, chances are the motor and bellows are simply worn out. The Sealand 385311423 Vacuflush SW Rebuild Kit gives S-series and T-series pumps a complete refresh with a redesigned 12-volt whisper motor mounted at the improved 90-degree angle, paired with a new bellows built specifically to work with it. The result is a noticeably quieter flush and a stronger, more consistent vacuum draw, without the guesswork of mixing old and new parts.
This kit is built as a true drop-in upgrade rather than a patch job. Because the newer motor isn't compatible with older-style bellows, Sealand packages everything needed together: the motor, bellows, eccentric, o-rings, bellows clamps, and bellows bolt. That means owners of aging S and T pumps aren't stuck sourcing individual parts or worrying about mismatched components causing leaks or premature failure down the road.
For boat owners and RV owners alike, this rebuild kit is often the more economical choice compared to replacing an entire pump assembly. It restores reliable operation to a pump that's otherwise in good working condition, extending its service life while cutting down on one of the most common complaints in marine sanitation systems: noise.
Key Features
- Redesigned 90-degree whisper motor generates significantly less operating noise than older 45-degree motors
- Complete kit includes motor, bellows, eccentric, o-rings, bellows clamps, and bellows bolt
- Bellows engineered to match the new motor design, preventing clogging and improving vacuum efficiency
- Direct replacement for obsolete Sealand part numbers 385311065 and 310245
- Straightforward installation using factory-matched components
Applications
- Rebuilding worn Sealand/Dometic S-series vacuum toilet pumps
- Rebuilding Sealand/Dometic T-series discharge/macerator pumps
- Upgrading older, louder marine toilet pump motors to the quieter whisper design
- Marine sanitation systems on boats and yachts
- RV toilet pump systems using compatible S or T series pumps
Specifications
- Voltage: 12V DC
- Compatible pumps: S-Pump (part 317201200), T-Pump (part 317301200), VG4 (part 317780012)
- Replaces: Sealand 385311065, Sealand 310245
- Kit contents: whisper motor, bellows, eccentric, o-rings, bellows clamps, bellows bolt
- O-ring style: newer 8-bolt o-ring pattern (not compatible with clamp-style older pumps)
- Brand: Sealand / Dometic
Frequently Asked Questions
Q: Will this kit work on a pump held together with a large clamp instead of bolts?
A: No. This kit is designed for the newer 8-bolt pump style. Older clamp-style pumps require a different o-ring configuration, so check your pump design before ordering.
Q: Can this kit be installed without replacing the bellows?
A: No. The new motor uses a different eccentric and stroke length, so it is not compatible with older bellows. All kit components must be installed together for proper operation.
Q: Does this kit fit both 12V and 24V systems?
A: This specific kit, part number 385311423, is the 12V version. A separate 24V version exists under a different part number, so confirm your system voltage before purchasing.
Q: How much quieter is the whisper motor compared to the original motor?
A: The redesigned motor and matched bellows are built to significantly reduce the thumping noise associated with older-style pumps, offering a noticeably quieter flush cycle.
Q: Is this kit only for boats, or can it be used in RVs too?
A: It works in both applications. Any S-series or T-series Sealand/Dometic pump used in a boat or RV sanitation system that matches the compatible part numbers can use this kit.
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