For full automatic bilge pumping operation, connect the automatic switch to your bilge pump. The automatic switch has a time-proven micro switch without mercury. When water exceeds the acceptable level, the pump is turned on by a rolling steel ball, which changes the pressure on the micro-switch. It attaches to any Johnson Pump bilge pump through the clip on T-slot and can be used with 6, 12, 24, or 32 V systems. Use for a better and safer life afloat!

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov