Quote:
Originally Posted by donmorris
Thor tuscany mt44. 2017 model. 1 and 1/2 bath. Rear has maserator toilet mid bath regular rv stool. Mid bath feeds to black along with the rear sink. Rear toilet feeds to gray tank.
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Did you buy this coach used?
You may want to contact Thor and ask them for a waste water plumbing schematic and see if the situation is by design or screw up.