Black tank has three connections...inlet from toilet, 1.5" vent pipe, and the 3" outlet plus the wires that connect to the worthless tank levels gauge. First two have to be cut close to the tank, but leaving enough pipe for a rubber no hub coupling when it comes time to re-install. Output pipe means disassembly of valve which is messie or cutting the piping before it connects to the y coupling....best to do...then connect back again with a 3" no hub coupling. Tank is held in place by steel square tubing under the side lips at the top of the tank, so one of these, inside rail, should be the one that can be removed. Tank will fall out unless you are prepared when removing the rail. All this work needs to be done on your back while laying under the rig. So if you can do all this, then happy work party. It will be a bit of work and if you decide to break the outlet valve instead of cutting the pipe...be prepared to get some numbers one and two flowing out even with an empty tank. And it doesn't smell to nice under there while working either.
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