I have a ace 27.2 . Used it twice and both times toilet plugged. I took toilet off and seen the plug right at the bottom. The black tank on this end is only 4 inches deep and pipe sticks thru a little. This is a piss poor design. For one there is never water on this end of tank except for flush. Then the crap has to run down this shallow part of tank and drop down into deep part of tank. Bad design.
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