Bathroom lavatory sink: is it going to grey or dark tank?
The owner manual I have (not sure I have the appropriate one) says that the bathroom sink MAY drain in the black water tank.
Other than starting with empty GREY and BLACK tanks, and letting the faucet run for a while to find out which tank if filling up, is there another way to find where that sink drains?
Bathroom lavatory sink: is it going to grey or dark tank?
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