How many grey and black tanks does it have? The monitor panel may show 4 and when you press the level sensor it may light up 4 tanks. Common for makers to use one panel for multiple lines/configurations.
I've seen toy haulers with a rear toilet have only 3 tanks and everything at the back drain into a black tank.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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