• Normally open switch
• Closes when pump vacuum is sensed
• Opens when pump is shut down or water tank goes dry
• Should be used on pressure washers 3 GPM to 4.5 GPM
• Vacuum Required: 2.5” HG
• Inlet: 1/4” FPT
• Contacts: 16 AMP
• Max Water Temp: 131º F
• Weight: 1.25 lbs.