Thetford toilet cassette pump failure.

Cudders
Cudders Forum Participant Posts: 3
edited April 29 in Parts & Accessories #1

During the caravan season we suffered a failure of our toilet cassette pump which resulted in a replacement.

We use the green flush fluid and empty the flush chamber after each trip.

What does one do to ensure smooth running throughout the season?

Any tips on how to prevent this happening again?

Comments

  • TobyLeeds
    TobyLeeds Forum Participant Posts: 146
    edited April 29 #2

    A couple of years ago our thetford toilet pump stopped working. I drained the tank and part filled it with hot water. Pump started and has been fine ever since. - worth a try but don’t use boiling water as the pump is only plastic.

  • Tinwheeler
    Tinwheeler Forum Participant Posts: 23,134 ✭✭✭
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    edited April 29 #3

    The pumps are prone to seizing up and often all that is necessary is to access it and give the impeller a flick to start it working again.

    YouTube has videos that will help.

  • mickysf
    mickysf Forum Participant Posts: 6,474 ✭✭✭
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    edited April 29 #4

    Try reversing the polarity on the pump itself. Briefly and for three or four attempts cleared a sticky pump for us. It’s still going strong a few years later.

  • Cornersteady
    Cornersteady Club Member Posts: 14,425 ✭✭✭
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    edited April 29 #5

    +1

    Ours did just that, we followed a youvideo and the procedure is very easy even for a complete non technical person like me, gave the impeller a quick push and all was well.  

  • AGOG
    AGOG Forum Participant Posts: 58
    edited May 13 #6

    I suffered this. It was down to an accumulation of black gunk I think caused by pink fluid. Just used water since and it's been fine. However there is still black residue in there. Any ideas how too clear once and for all?

  • plainbob
    plainbob Forum Participant Posts: 10
    edited September 7 #7

    I suffered the same problem in July and likewise watched the youtube video and freed the impeller.   This worked for about 3 weeks and then gave up.   When I took out the pump and tested it it still worked but back under the water and it didn't.   Subsequently I have had the pump replaced.   What the video does not tell you is that in freeing the impeller you may loosen the bond between it and its shaft and so it will not work under the pressure of water.   The shaft spins around but not the blades of the impeller.

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