Aqua Logic’s water flow switches are the best way to safe guard your equipment if the pump is mistakenly turned off or fails. Freeze damage to a heat exchanger is not covered by warranties and the resulting water damage that occurs when the unit thaws out, can mean costly repairs or replacement of your chiller. A UV sterilizer can overheat and electrical components will be irreparably damaged if water flow is cut off. These inexpensive and easy to install water flow switches are great insurance. When water flow stops the switch will automatically turn off the equipment you have it connected to.