First Water Flex-Chlorinator, Руководство по эксплуатации

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5
Chemical Preparation
The presence of chlorine residual in drinking water indicates that:
1) a sufficient amount of chlorine was added initially to the water to inac-
tivate the bacteria and some viruses that cause diarrheal disease; and
2) the water is protected from recontamination during storage.
The presence of free residual chlorine in drinking water is correlated with
the absence of disease-causing organisms, and thus is a measure of the
potability of water.
The recommendations of the CDC Safe Water System (SWS) are as fol-
lows:
1. At 30 minutes after the addition of sodium hypochlorite there should
be no more than 2.0 ppm of free chlorine residual present (this ensures
the water does not have an unpleasant taste or odor).
2. At 24 hours after the addition of sodium hypochlorite to containers
that are used by families to store water there should be a minimum of 0.2
ppm of free chlorine residual present (this ensures microbiologically clean
water).
Further, the CDC Safe Water System recommends testing residual chlo-
rine by the following methods:
1. Pool test kits
2. Color wheel test kits
3. Digital Chlorimeters
For more information please visit http://www.cdc.gov/safewater
Note: This information is provided as a courtesy of First Water Systems,
Inc. First Water Systems, Inc. does not suggest or recommend ways or
procedures for using chlorine in drinking water. Local regulations should
be consulted before the use of chlorine in drinking water.