Black Tank Flush

Common problem in the Tiffins. On my Bus I had to remove the panel directly opposite the wet bay access on the passenger side of the unit. On my 2008 Bus it required 2 screws to be removed that go up into the floor from underneath. One at each end of the panel. The skin panel can then be pulled out from the bottom and swung up. I used a stick to hold it horizontal although if you raise it further it can be totally removed. The spray nozzle is in the top of the black tank held in with 3 or 4 screws and sealed with plumber's putty. Unscrew the screws, and the nozzle will pull out. I just cleaned mine with a toothpick. Re-knead the plumbers putty and use it to re-seal the nozzle. Less than an hour's job even if you dog it.