When I had my 2014 DS, the rear toilet got plugged. I unbolted the toilet and turned it around to work on it. My mistake, I took it apart inside the coach....big mess. The pump/motor is enclosed in a housing. Remove the entire housing unit as one piece and take it outside and then dismantle. I cleared mine and found nothing else in the unit. When I replaced it, it always whined, much louder than the front toilet. It worked fine until I sold the coach, so I lived with the sound. I did find a replacement motor, which was difficult to locate and was expensive. It's in my spare parts Tupperware box.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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