53
4.4
WATER PRESSURE
The water must be between 2bar and 7bar. The water pressure must not drop below 2 bar as oth-
erwise the function can be impaired! If the water softener is not regularly regenerated, this can
result in a pressure loss and impairment of the softening function.
In modern sanitary installations (in particular where single lever mixers are used), despite normal system
pressure conditions, peak pressures of up to over 30 bar frequently occur. This can cause damage to im-
portant functional interior parts of the controls. The optimum operating pressure for the water softener
lies between 3 bar and 5 bar. It works most economically under these pressure conditions.
In the event of water pressure above 7 bar, a pressure reduction valve must be fit-
ted upstream of the water softener (see fig. 2). An operating pressure of over 7 bar
can lead to malfunction and failure.
Fig. 2: Pressure reducer upstream of the water softener
For water pressures between 5 bar and 7 bar, the installation of a pressure reduc-
tion valve upstream of the water softener is recommended.
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