INSTALLER AND USER GUIDE FOR CROSS 90 DIRECT FLOW REVERSE OSMOSIS FILTER
2. SPECIFICATIONS AND COMPONENTS
2.2 WATER QUALITY
2.2.1 SUPPLY WATER QUALITY REQUIREMENTS*
№ Index
1
pH
2
TDS
3
Hardness
4
Free chlorine
5
Iron
Do not use with water that is microbiologically unsafe or of unknown quality without adequate
disinfection before or after the system.
* If water supply does not meet the requirements, service life of membrane and/or pre-filter
cartridges may be shortened.
** If your home is supplied with raw well water, perform laboratory test of your water before
in- stalling a reverse osmosis filter. If any of your water indices exceed the limit, consider using a
water treatment system to correct supply water quality. Refer to water treatment specialists or
companies for advice and proper equipment selection.
2.2.2 WATER QUALITY AFTER FILTER*
№ Index
1
pH
2
TDS
3
Calcium
4
Magnesium
5
Sodium + Potassium
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Value**
6.5-8.5
<1500 ppm
<500 ppm CaCO
3
(<28 °dH)
<0.5 ppm
<0.3 ppm
Value
5.5-6.5
5-15 ppm
<2 ppm
<1 ppm
<5 ppm
№ Index
6
Manganese
Chemical oxygen
7
demand
Total bacterial count
8
(TBC)
9
E. coli titer
* Values are determined under the following
conditions: temperature of supply water is
25 °C, supply water quality and operation
conditions correspond to manufacturer's
requirements.
5
Value**
<0.1 ppm
<5 ppm O
2
<50 CFU/mL
<3