I recently had a hydraulic line leak and had to take down the front underbelly to replace the line. While I had the underbelly open I looked for the tank drain valves and easily found the two 1 1/2" gray tank valves. I was unable to locate the 3" black tank valve though. The 3 inch outlet pipe runs above the lavatory gray tank so I'm sure hoping that I don't have to drop that gray tank just to service the black tank valve. Has anyone had to service their black tank valve and how did you access it? I didn't pull the rear underbelly and I'm hoping it's accessible from that location. Thank you!
I don't have a GK so not sure where it's located. Sounds like it may be above that grey tank... I would think you should just be able to follow the cable pull to it's location? Are you not able to see that?
2015 38RL, slide-in-slide, 1,600W of solar 800AH Victron lithium, MorRyde IS w/ Kodiac disc brakes, combined grey tanks w/ Drainmaster box and electric gate valves, towed by 2019 Ram 3500 Limited DRW.
If you actually have stacked holding tanks it must be something to do with the GK.
On our '12 RL we had two tanks in the drop frame section and the other two side-by-side in the belly.
Our '16 MB has the black and Gray side-by-side in the drop frame, Galley and second Black side-by-side in the belly just behind the drop frame and our Fresh water is above the axles.
Thought most all RWs were pretty much the same for holding tank configurations.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top
