My Cardinal 36LE has two black yanks one for each bath. There are two dump connections on the outside. I have a Y fitting to split the sewer hoses so I don't have to switch the hoses. There is also a wash out sprayers on each of the tanks, have two water hose connections for them.
Love my bath an half, kids don't mess up mine.
Hope this helps.
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2007 GMC 2500 Duramax Crew Cab LB
2008 5th Wheel Cardinal 36LE