Holding tank info needed

[Biker bill]

I have a 2019 3930 fb. I have a grey and black dump in the middle of the 5er. (Approx). I also have a grey and black dump in the convenient center. I have 0ne drain hose. Does my kitchen and half bath dump in the mid one, does the shower and bath sinks dump into the front one. Is it four equal size tanks, or the tanks different size. What size? Thanks, Bill

[Mikendebbie]

See screen shot of specs below fro tank capacity...
You divide the capacity x2...so generally 44 gals each tank.
The kitchen sink and half bath go to rear gray tank.
Half bath toilet goes to rear black tank.
Front bath sinks and shower go to the front gray tank.
Front bath toilet goes to front black tank.
I do not have washer-dryer and have not yet tested the plumbing to see where it drains to. Previous posts here seem to back up the fact that washer drain could be hooked up to either one - so better to test it before installing the washer so you will know.

In my unit the rear tanks drain really good because they are mounted in the frame at a higher elevation than the front tanks which are mounted in the drop frame under the front storage compartment. I generally close the valve and let the tank flush fill the tank for a few minutes and then let it drain. I have to do this several times for the rear black tank...much harder to get it clean.

[rohrmann]

The specs on your rig shows 66 gallon fresh, which would be a 54 gallon tank plus the 12 gallons in the water heater, 88 gallons gray and 88 gallons black. It doesn't break down individual waste tanks, so I'd just guess 44 gallons each for all the waste tanks. https://www.keystonerv.com/media/914...6pg-lowres.pdf