Safety - AC Float Switch L Shape Overflow Shut-Off is a must-have for your HVAC and refrigeration needs. It detects clogged air conditioning drains and automatically shuts down the system to prevent water from overflowing and damaging floors, walls and ceilings. Easy Installation - AC Float Switch includes 3/4 inch adapter, busing, cap&switch. It can be installed on the auxiliary drain outlet of primary pan by using the3/4 adaptor, The switch can be connected to either the VCC or thermostat wires. You can use PTEE tape for the adaptor connecting to get high watertight. Advanced Technology - SS2 Float Switches are made of advanced technology with stable performance. Applications - Detects clogged A/C condensate drain and shuts off the system, Using the 3/4 inch adapter the SS2 can be installed on the auxiliary outlet of the primary drain pan, Easy access to the switch and the primary drain line for service Connect the switch wiring to vcc or thermostat wire. 3/4 adaptor Connect the 3/4 adaptor to auxiliary drain outlet of primary pan. SS2 Float Switch SS2 Float Switch: When there is no water overflowing, the floater stays on the bottom of the switch, the switch is close loop, and output ON signal; When there is water overflowing, the floater is raised by buoyancy and trigger the switch to open loop, and output OFF signal to shut-off the device. SS2 float switch Function 6ft wire Float switch 3/4 inch adaptor Color: White & Black Material: PVC Package Contents: 2 x SS2 Float Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.