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

$400.32 $284.95
(You save $115.37)
(13 reviews) Write a Review
385311423A, 311423A
IN Stock
Calculated at Checkout

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, (4) 1 1/2" Duck Bill Valves



  • 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*


13 Reviews Hide Reviews Show Reviews

  • 4
    Replacement works well

    Posted by Bill Woods on 18th Feb 2019

    My original pump was no longer available and the folks at Seacoast helped me find the correct replacement. Price was fair, shipping was fast and it does bolt on and works well. But like most things on a Boat it is difficult to access all the hardware for removal and install.

  • 5
    everything fit great

    Posted by jeff morley on 14th Jun 2018

    not a two minute job, but well worth it

  • 5
    Great kit and service

    Posted by Jeremy Carter 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.

  • 5
    easy upgrade

    Posted by steve 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 .

  • 5
    Huge difference in noise!

    Posted by G Joseph Betar 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!

  • 5
    well worth it

    Posted by Unknown 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

    Posted by eric weatherly on 22nd May 2016

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

  • 5
    Vacuum pump system

    Posted by Unknown 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.

  • 5
    Well worth the cost and time to rebuild it yourself

    Posted by Unknown on 18th Dec 2015

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