The Mercury Displacement Model VS-120R1R9L-01 vertical float switch is designed for sump pump control. The unit features adjustable float stops, a rod guide, pipe clamp, and stainless steel bracket. The switch and cord assembly is suitable for exposure to sewage environments. The plug assembly fits into a standard three-prong, 120 VAC electrical outlet and has an integral three-prong switched socket for sump pump control. The pump connects into the back of the power plug and switching level actuation is controlled through the positioning of the float using the field adjustable stops. The VS-120RIR9L-01 contact makes on the high level setting and opens on teh low level setting.