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The "Hydro Air" system provides a safe, reliable, and fully automatic way to operate a pump. As the water rises or falls in the plastic bell, it generates air pressure that triggers the switch and opens or closes the circuit to activate the pump. Installation is simple, with the control and cable mounted in a dry location while only the plastic bell containing air is placed in the bilge. The bell opens at approximately 50 mm and closes at 13 mm to accurately detect changes in water level. The kit includes the switch, plastic bell, and a 3-meter pipeline.
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