Method for transforming siphon filter into air-water backwashing filter

The invention discloses a method for transforming a siphon filter into an air-water backwashing filter, and relates to the technical field of transformation of siphon filters. The problem that a filter tank is insufficient in treatment capacity is solved. The method specifically comprises the following steps: arranging a water inlet/outlet system on the basis of an original filter body; the water distribution systems are arranged in sequence; a siphon system is arranged in a water outlet area of the original filter tank body; a V-shaped groove is formed in the inner wall of one side of the original filter tank body; the water inlet/outlet system comprises a water inlet assembly used for replacing an original water inlet siphon and a water outlet assembly used for replacing an original water outlet siphon. The water inlet assembly comprises a first cast iron gate arranged in the water distribution channel, and the first cast iron gate is a water inlet valve of each filter tank. Compared with the prior art, an