No electrician needed!
Use these mercury float switches to automatically operate pumps or alarms. They have 10’ SJOW-A Class underwater-rated cable with a piggyback plug so devices can be conveniently plugged into it at the power receptacle (all float switch installations should be GFCI-protected and installed on thermally protected equipment only). Pump Up (U)=when pump switch falls, pump turns on. Pump Down (D)=when pump switch lifts, pump turns on. UL-listed and CSA-certified. Ship weight 2 lbs. One-year warranty. Not for use in potable water.