Inspected water heater customer has about half a cup of water per day appearing in the drain pan checked all piping inspected water heater as well as inside the burner compartment but found no rust or leaks noted that there is corrosion on the top and bottom seal of the tank informed customer that although we were not able to find the source of the leak the only possible source of water would be from a leaking tank and is likly a very slow leak the only way to repair this would be to replace the water heater. Put burner assembly back together and relit water heater. Reccomend customer call Russell plumbing for water heater installation.