Flushing is necessary before water sampling.
- ๐๐ฒ๐บ๐ผ๐๐ฒ ๐ฆ๐๐ฎ๐ด๐ป๐ฎ๐ป๐ ๐ช๐ฎ๐๐ฒ๐ซ
Water that sits in the pipes, especially at sampling points, can accumulate contaminants, bacteria, or biofilms that don`t represent the systems normal water quality. - ๐๐ง๐ฌ๐ฎ๐ซ๐ ๐๐๐๐ฎ๐ซ๐๐ญ๐ ๐๐๐ฌ๐ญ๐ข๐ง๐
Flushing helps collect a more consistent and reliable sample that reflects the true quality of the water in active circulation, ensuring accurate results for microbial and chemical testing.
Without flushing, contaminants from stagnant water could give misleading results, either showing higher contamination levels or masking problems that exist in the system.
In microbiology, water flushing time before sampling typically depends on the sampling point and the purpose of the test.
For potable water systems, a common practice is to flush the system for 2-5 minutes to ensure that stagnant water is removed and that a representative sample is collected.
For purified water or water for injection (WFI) systems, flushing may vary from 30 seconds to 2 minutes, depending on system validation and SOPs (Standard Operating Procedures).
In some companies, the water does not flush in the GMP areas.n Sampling point cover with aluminium foil
