Single black/gray drain outlet
Our last tt (2016 crossroads zinger) had two separate gray tanks with two separate drains..so, at dump station, it would be - connect / drain/ disconnect, and then do it again at the second drain.. al...
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I have seen quite a few with dump valve in the rear-because of rear kitchen?- and towards the middle on same rig. They use a "Y" to connect from 2 hoses to the hose at the dump hole.
