SJE-RHOMBUS 1001817 SJE-Rhombus 15JSD1WP - Junior Super Single® Mercury-Activated Pump Switch 120V 13A Pump Down w/ 15' Cord+Plug
Vertical Float Switch - Narrow Pumping Range - Normally Closed - 20 Foot Cord with Skived Cord Ends
Sludge Boss Septic Float Switch, Heavy-Duty Sewage Pump Switch for Viscous Liquids and Suspended Solids in Wastewater, Mercury-Free Self-Orienting Tank Float for Septic Pumps to 1/2 HP (20 Ft Cable) - Amazon.com