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Whisper Motor Upgrade Kit 12 Volts w/ 1 1/2" Duck Bill Valves

$425.93 $264.95
(You save $160.98)
385311423A, 311423A
IN Stock
Calculated at checkout

Product Description

Are you tired of hearing that clicking noise everytime your VacuFlush® toilet is flushed? SeaLand / Dometic®  had their engineers come up with the answer that will make your VacuFlush® Sanitation even Better!


Included in Kit: Bellows, Bellows clamps, O'Rings & Whisper Motor w/mounting hardware, (2) 1 1/2" Duck Bill Valve Kits



  • Creates 50% less sound than previous motors, makes for a much quieter operation

  • Flexible Coupling - isolates motor from drive shaft to eliminate "knock"

  • Industrial Grade Gears - precision machined gearing results in minimum noise and maximum load-carrying capability

  • Faster Vacuum Recovery - 7% increase in motor RPM regenerates vacuum faster

  • Integral Thermal Switch - shuts down pump to avoid overheating, Includes automatic restart

  • Retrofit Kit Available - 12vt & 24vt models Applies to all VacuFlush® system applications*


Product Reviews

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  1. Great kit and service 5 Star Review

    Posted by on 7th Aug 2017

    Something bad happened with our pump and it needed to be rebuilt. While we had it torn apart we opted to replace the motor as well. The new pump and kit worked perfectly and is much quieter. The information and support that Seacoast Services provides is top tier.

  2. easy upgrade 5 Star Review

    Posted by on 4th Mar 2017

    This was a very simple easy upgrade for a replacement of my inop vac motor. Runs quick and quiet. I recommend a new toilet water valve and bowl seal at the same time. Easy upgrade .

  3. Huge difference in noise! 5 Star Review

    Posted by on 11th Sep 2016

    This was a great upgrade to my old S series pump! Noise level is much lower and the unit develops vacuum in a fraction of the previous time. Don't be worried if the 1/2 clamps seem to big, just follow the instructions and tap them in with a hammer. They work just fine!

  4. well worth it 5 Star Review

    Posted by on 30th May 2016

    The existing pump was running longer than usual. Started looking for a rebuild kit. Found the rebuild kit and the whisper motor and bellows upgrade. Glad I spent the extra money on the upgrade. Much quieter than the original. Note: The bellows is a little smaller than the original, I thought I ordered the wrong one. I called Seacoast to check, and they assured me it was correct. I did the upgrade and it works great.

  5. Easy Fix 5 Star Review

    Posted by on 22nd May 2016

    All parts were an exact fit. New pump much quieter than the original.

  6. Vacuum pump system 5 Star Review

    Posted by on 7th Apr 2016

    The new vacum pump works quietly and satisfys quickly. Hopefullly it will have the same reliability that has always been part of this system.

  7. Well worth the cost and time to rebuild it yourself 5 Star Review

    Posted by on 18th Dec 2015

    Rebuild is simple, motor is less than half as loud as original. it is a direct fit. Very Satisfied!

  8. Vacuflush Whisper Conversion 5 Star Review

    Posted by on 2nd Feb 2015

    Is truly quieter. The horses are no longer galloping through the bilge! New motor runs faster, pump runs shorter time, old clumping sound replaced with a noticeably quieter swooshing.

  9. significantly quieter and reasonably easy to install 5 Star Review

    Posted by on 15th Aug 2014

    As on all boats, gaining access to what you need to work on is half the battle. Product was reasonably easy to install and made a considerable difference with respect to noise. It was worth the effort and I recommend this to anyone that needs to rebuild this part of the vacuflush system.

  10. Whisper Motor upgrade 1 Star Review

    Posted by on 3rd Aug 2014

    Followed the instructions. Started pump up to a loud clack on each cycle. Pulled it apart to find piston base had self destructed - comparing new piston to old and they are different sizes(literature says this bellows fits ALL pumps). Re-instated old pump and bellows system with new seals.
    Can't work this one out, but an expensive error somewhere.

    Seacoast Services Response.
    The bellows for all vacuum pumps and discharge pumps are all the same. SeaLand hase redesigned this part many times to improve system performance. We believe there was an installation error.
    Again we are here to help, If you do not call or email us we cannot help you.

  11. Whisper Motor Upgrade Kit 12 Volts w/ 1 1/2" Duck Bill Valves 5 Star Review

    Posted by on 10th Sep 2013

    works great, very quiet

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