Shurflo Standard Automatic Bilge Pump Switch This Shurflo Standard Automatic Bilge Pump Switch will activate when the water level reaches 1-34 and will turn off when the water level falls to 34. It is used for bilge water evacuation in conjunction with your boats bilge pump. With a 3 tinned wire assembly, remote or direct mounting, and a protected ignition, this bilge pump switch offers exceptional satisfaction and long lasting use. It is recommended that you mount your bilge switch horizontal f