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Pipe length - 3 m; Spraying length - 2.5m Filter with polypropylene spraying d.140 is used in almost all non-suffosion non-cohesive and cohesive soils; - protection against penetration of root tissues and sand into the pipe filter; - possibility of use in neutral, acidic and alkaline environments with high mineralization of groundwater; - well filter has high mechanical strength; - simple design; - ease of installation of the well filter; - high performance characteristics - the design by the nature of formation opening is close to an ideal drain; - well filter has a wide range of design types and execution options; - filter coating complies with TU U 25.2-32556556-001-2003 and is approved for use by the Ministry of Health of Ukraine. Pipes with water intake layer (well filter) made of fibrous-porous polypropylene have an optimal ratio in terms of: - filtration rate; - one of the best filter cycles; quality of purification from suspended solids; - protection against penetration of root tissues into the pipe filter; - increased dirt capacity of the filter; - possibility of flushing at high speed, which allows achieving a high degree of re