Quote:
Originally Posted by taylorbob1
FYI...
there's a reason why all RVs drain the bath sink into the Black tank
it's to add a little soapy sink water to the solids
personally, I would not change it
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They don’t “all” drain into the black tank. Some do and some don’t. If you want to know either get a diagram from the manufacturer or, after draining the grey and black tanks run the bathroom sink faucet for a few minutes and see which tank it comes out of.