Multiquip Submersible Water Pump - ST2037F, 73 GPM, 2", Submersible Pump With Float Switch
VEVOR Sump Pump, 1.5 HP 6000 GPH, Submersible Cast Iron and Stainless Steel Water Pump, 1-1/2" Discharge With 1-1/4" Adaptor, Automatic Vertical Float Switch, for Indoor Basement Water Basin - Walmart.com
Sump Pump Float Switch Working Principle | Tameson.com