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Tvrtka Paparelli Alessandro e Figlio 50-ih godina prošlog stoljeća počinje proizvodnju cijevi i filtre za bunare. Paparelli danas otprema 35% svojih proizvoda na talijansko tržište, a preostalih 65% na europsko, azijsko, afričko i južnoameričko tržište.
Paparelli proizvodi sve što je potrebno za formiranje kolone: cijevi, spiralne filtre, mostićave filtre, jednostavne filtre i pribor (kao što su prsteni, prirubnice, redukcije, centralizeri, kape i sl.)
The casing and screens are made from tin between 3 and 10 mm thickness, with a minimum diameter of 114 mm.Materials are carbon steel (FE 37 – FE 52), black or galvanized and stainless steel (304, 304L, 316, 316L).
The selection of the material depends on the purpose of the line (potable water, drainage, desalinization, spa and pools, industry, research etc.), on the geological situation, the power conditions for drilling, the chemical aggression of water and on corrosion.
