Not sure where to start. My Galley sinks are not draining and I was going to pull the p-trap under the sink to see if it was plugged up but then I noticed this. I was checking the led control panel and I observed this.
The back black tank is empty
The back gray tank is empty
The mid black tank is empty
But the mid gray tank reads full - is this why the sink won’t drain. Where can I start to look.
My sewer line is connected and I pulled both levers for black and gray tanks. Is there another lever I missed? Any suggestions would be appreciated
My Miramar has 1 black and 1 grey tank. If your black tank empties and your bathrooms does not have sewer odors, I think your roof vent is good. I am wondering if your gray waste system has a physical clog preventing water to drain Into the tank. The other possibility is the tank is full and you can not empty the wastewater. Thor Customer Service has blueprints for your motorhome model. They will email copies to you.