Tank Monitoring System

[lapoldo]

Hoping someone can help out a newbie. I have a 2018 Forest River Heritage Glen 300BH and my tank monitoring panel looks like the attached picture.

When you push each button on the right hand panel the lights illuminate to show you how full each tank is. There are buttons for the black tank, two grey tanks and fresh water tank. As an aside, there is also a button for monitoring the battery voltage.

My question is, what is the micro monitor box on the left side of the picture? It can't be for the black tank, because when the "waste" button on the micro monitor is pushed it shows empty, but the black tank button on the right correctly shows that the black tank is currently 2/3rds full.

Any assistance would be appreciated. Thanks.

Lou

[Herk7769]

Maybe its the Galley tank for the sink?

Look underneath for a small drain pipe with a gate valve separate from the Lavatory black and gray water tanks.

Oops, never mind; I see your panel has two gray tank buttons.
Sorry...

[lapoldo]

I have a dilemma with that one too. There are supposedly two grey tanks according to the specs on the manufacturer site, however there are three grey water release valves. Two that feed one grey drain pipe and one that feeds another drain pipe that is shared with the black tank. I'm assuming the latter comes from the shower and bathroom sink, while the former two are from the indoor and outdoor kitchen sinks. What I don't understand is how there could be three valves and two tanks? There is obviously also a black tank valve that shares the pipe with the bathroom grey tank.