How are tanks plumbed

[Dallas]

I have asked JAYCO 3Xs and cannot get an answer. Hope someone here knows.
I have a 2017 Pinnacle 36KPTS. I am wanting to know which tanks the sinks and washer drain into and which tank the shower drains into.
Also, are the 2 tanks connected in any way?
If anyone can shed some light on this it will be appreciated.
When at the RV park with sewer hookup I leave 1 open and drain 2 and black on demand. While at COE park I keep all closed until I use my blue buddy tote. I noticed when 1 is full my bathroom sink back up and I hear gurgle in washer drain.
I am dumbfounded on our plumbing and JAYCO only tells me "everything drains into a tank". No help. Thanks in advance.

[bdreinv]

This not much help but this is how are 16 Eagle 321 RSTS is plumbed! Jayco would not give us the schematics until are warranty expired.Then they emailed them all. Thanks

[PlayersZ28]

You should be able to figure it out by following the plumbing but you have to pull the basement side panel to see it (at least on mine). I have a tank under the kitchen that covers the sink there and then the bathroom is on the tank under the basement. Pretty sure the washer drain would go to the bathroom tank but I haven't looked as I don't have a washer installed anyway. I think the tanks all share a vent though as I only have one 1.5" pipe going to the roof.

I don't have any valves open until I want to dump, hooked up or not.

[Mopar_Earl]

Drain all tanks and close valves. Run water in each sink one at a time and watch/listen which tank it comes out of by opening the tank valve unit you find the water you put in the tank.


Earl

[Chrisb-24]

Call Jayco and give the last eight digits of your VIN. Ask them for the PDF files on your unit. You'll get the electrical, plumbing, and frame system. Then you'll have everything you need to trace whatever you need to find out. Good luck in your plumbing journey.
Chris

[Dallas]

Thanks Chris. That sounds like a plan.