The Rectorseal SS103E Electronic Condensate Overflow Switch is a compact, easy-to-use overflow switch that can be mounted in any location. The switch features a red LED indicator that will light up when the switch is activated, and a reset button for easy operation. The switch is compatible with most 3/4" water lines and is backed by a one year warranty. The Rectorseal SS103E Electronic Condensate Overflow Switch is a compact, easy-to-use overflow switch that can be mounted in any location. The switch features a red LED indicator that will light up when the switch is activated, and a reset button for easy operation. The switch is compatible with most 3/4" water lines and is backed by a one year warranty.