We have a 35C also with a bath and a half and just dump tanks as we need, we generally only do one set at a time. The mid tanks get filled quicker than the rear and the black tank needs flushing more frequently since it extends the width of the coach. We have a Y sewer connector but have learned it isn't necessary.
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John
2016 Thor Hurricane 35C with pups Piper and Annabelle
2013 Ford Fiesta toad
FMCA - F457085
Blog - https://traversity.us
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