The pump are of self-priming pump. It is suitable to the irrigation in garden, irrigation in farm land, removing dust in factories and wells, reducing temperature, planting in city and carrying water in life. To avoid the mixing of air and water, self-priming pumps create a partial vacuum to discharge water while also evacuating any air. It does this by combining the air and water during the priming process, forcing the air to rise and the water to sink or go down.
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