5-6 yr svce life is low for wtr heaters,,, must have been really cheap pick by bldrs,,, difficult to imagine everyone now flushing them at least every 6mos,,, you can also pick up alarms at apron / vest stores - near the sump pumps here,,, they probably don't sell too many sump pumps in fl so let me know if you need 1 & i'll send/bring it down
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