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2.0 METERS OF FILTER ON A THREE-METER PIPE Stainless steel filter for wells d 140 is used in almost all non-suffosion non-cohesive and cohesive soils; - protection against penetration of root tissues and sand into the filter pipe; - possibility of use in neutral, acidic and alkaline environments with high mineralization of groundwater; - well filter has high mechanical strength; - ease of installation of well filter; - high performance characteristics - the design is close to an ideal drain in terms of the nature of formation opening; - well filter has a wide range of design types and versions; Pipes with water intake layer (well filter) made of fibrous-porous polypropylene compared to analogues have an optimal ratio in terms of: - filtration rate; - high quality of purification from suspended solids; - protection against penetration of root tissues into the filter pipe; filter dirt capacity; - possibility of washing at high speed, which allows achieving a high degree of regeneration; - low hydraulic resistance.