The American Standard toilets engineered to be virtually clog-free are those featuring the Champion 4 flushing system or the Cadet Pro collection. The Champion 4 model utilizes an extra-wide, fully glazed trapway combined with a massive 4-inch piston-action flush valve that allows water to enter the bowl rapidly, enabling it to clear unprecedented volumes of solid waste instantly on a single flush without backing up or requiring secondary plunger intervention.
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