Came out for a high water bill. Meter spinning constantly. Shut off water at main valve, this did stop the meter from spinning. They have an extra guest bedroom in their basement that they never go into. Found a toilet in the bathroom of this room that was running constantly that no one was aware of. Received approval to rebuild the toilet. Rebuilt the toilet and tested to ensure proper function. No further issue. Confirmed at meter that there were no other leaks present.