Common problems with American Standard toilets typically involve a running tank caused by mineral scale buildup under the flapper or flush seal, slack in the trip lever chain, or wear on older piston-style flush valves. Over time, hard water calcium deposits can accumulate around the rim holes or trapway, slightly reducing flushing efficiency. Fortunately, these minor mechanical issues are easily resolved by cleaning components or swapping standard replacement parts like flappers and fill valves.
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