Commercial Tank type toilet

I'd go with an American Standard Cadet Pro, preferably the FlushMate version. The non-assisted variety takes standard guts too.

breplum said:

Champion is always impressive when the rep. flushes 13 golf balls at the trade shows and demo days, but non common insides is unappealing.

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The Champion 4 is a good one. The only thing different from normal is the flapper, and I can find those almost anywhere in my neck of the woods.