Quote:
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Originally Posted by bstark
Closing your grey tank valve a couple of days prior to leaving can also be a good thing to do so that you have the added waste water available to assist clearing a blockage at the black gate by alternatively closing your extreme end of pipe gate (if you haven't installed one, do so now) and opening the grey to have water from the grey push through the line and up into the black and perhaps dislodge a blockage back into the black tank to then try again.
That soapy grey water is also nice to have handy as the last stuff to go down your sewage hose to "clean" it of the nasty bits and pieces of your prior black tank dumping and flushing exercise.
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With regards to the above text in bold, that will depend on the various models and brands. In our 2010, the black tank is mounted above the grey tank, so I doubt that the water released from the grey tank will even go up into the black tank.
In the picture, it shows the upper tank in the raised portion of the frame as the black tank, into which the toilet dumps directly. The tank that is below it is the grey tank.
Directly behind the "raise" in the frame at the entry steps is the fresh water tank.
Terry