2023 Montana 3941FO Washer

[HLB]

Does the washing machine drain into the Black or Grey tank? Where do you find detailed info like this on your specific model? I am new here and will probably have several questions like this over time.

[Mikendebbie]

Unfortunately - you have to do a test to find out how yours is plumbed. My washer drains to the rear black tank. Based on reading this forum on the subject - the plumbing varies...all over the map...no consistency model to model...whatever the assembly line worker felt like running it that day.

Run one load with both your gray and black tank valves closed...then open them up one at a time and see what comes out. It helps keep my rear black tank cleaned out real good! I let it run two loads before dumping.

[Carl n Susan]

The washer/dryer location is at the back of the RV on the passenger side. There are both black and grey (shower) tanks back there. But which one is closest to the washer drain depends on how the tanks were installed. As Mikendebbie wrote; you are going to have to test to find out the answer.