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This is an updated new edition. The requirements and dimensions for plastic screens and casings of PVC-U with the nominal sizes DN 250 to DN 400 and the threaded connection. The pipes serve for the extension of tube wells for the extraction of groundwater. The standard has been prepared by Working Committee NA 119-04-11 AA "Brunnenbau" ("Well construction") at NAW.
This document replaces DIN 4925-3:1999-04 .
This document has been replaced by: DIN 4925-3:2017-10 .