There are a few different reasons as to why the Mansfield model 160 could be leaking into the floor. The first is, There may be a crack in the tank somewhere. If this is the case the entire tank will have to be replaced. You can replace the complete 160 tank without getting a new bowl. The other reason it could be leaking into the floor is the tank to bowl gasket. The gasket could be worn out and allowing water to leak through. If this is the problem you can replace the Mansfield 630-0204 tank to bowl kit to resolve the issue.
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