GENO
®
-flushing compressor 1988 K
Order no. 015 151 963-inter Created: KONS-gmei-mrie G:\BA-151963-INTER_GENO-SPUELKOMP-1988_K.DOC
12
2 | Differentiation between "system disinfection" and
"disinfection of the drinking water"
"System disinfection" is a complete measure for disinfection of a
drinking water installation and, during this time, drinking water is not
available to consumers. "System disinfection" is only a long term
solution if the causes of contamination are remedied.
"Disinfection of the drinking water" is transient long-term disinfection
before and/or during the technical sanitation of the drinking water
installation. The addition of disinfection by the water supplier must be
taken into account.
3 | Basis as per W 557, section 4
Drinking water must not impair the health of consumers. In addition to
the long-term protection of drinking water resources and preparation
and distribution in accordance with the generally recognised codes of
practice this also requires a properly planned, set up and operated
drinking water installation.
In particular, the drinking water installation can become contaminated
when newly constructed and during repairs. Contamination with
pathogens is a key danger. As long as the contamination remains
suspended or dissolved in the water, it is possible to flush it out of the
drinking water installation without any great difficulties. The first step in
remedying pollution is always cleaning. This is also true with microbial
contamination. Micro-organisms embedded in particles or corrosion
products are virtually impossible to kill off with disinfectants as these are
unable to access the micro-organisms. For this reason, the particles or
corrosion products must be removed by flushing or other cleaning
measures. System disinfection may be necessary as an additional safety
measure.
In existing drinking water installations with zinc-coated steel pipelines in
the hot water area, the water can become discoloured after even a brief
stagnation time due to corrosion. Flushing and other cleaning measures
are either not or only briefly effective in such cases. The dosing of
inhibitors can result in an improvement.
