Flow Switch, Aqualarm, 8-12 GPM, 1 Amp, Replacment Switch Only : PVC-NOS-1

Monitors Water Flow to prevent damage due to overheating. Activates a visual or audible device immediately whenever raw water flow is stopped or impeded is a two wire, non- polarity switch that is Normally Closed (Normally Open available) and opens at 6 to 8 GPM of raw water flow. It stays open until flow slows or ceases and then actives any audible or visual alarm.