Reviews for Rule 40 Rule-A-Matic Plus Float Switch

June 5, 2015

Used two in my sloop. Both worked for about 1 season, and then both failed. Continuously delivered power to the pumps, and would not shut off -- even if manually held in off position. I cut one of the "waterproof" switch units open, and found it was full of water. You'll do better with a mercury switch thoroughly packed with urethane for waterproofing.