The shower should dump into the grey tank, but not always as some on this forum have indicated. If you put the Rockwood year and model in your signature, or include it in your post, others with that like model can give their insight into you tanks.
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Chap , DW Joy, and Fur Baby Sango
2017 F350 Lariat CCSB, SRW, 4x4, 6.7 PS
2017 Grand Design Reflection 337RLS
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