6
Pre-Treatment Summary Chart
Recommended
Feed Water Range
Potential
Effect
Pre-Treatment Solution
Waterite
Models
TDS
< 2000 ppm
Reduced production rate
Increased salt passage
Contact Waterite/ Replace
water source
RSL HP
T. Hardness
< 6 grains/gal
(103 mg/l)
Scaling of membrane surface
Reduced production rate
Automatic Softener
Fusion² series
Gem series
Total Iron
< .05 ppm
Reduced production rate
Fouling of membrane surface
Iron deposits in equipment
Iron Remover (> 5 ppm)
Softener (levels < 5 ppm)
FOB series
Tannins
< .5 ppm
Reduced production rate
Fouling of membrane surface
Softener with organic
scavenger resin
Gem series
Chlorine
< .1 ppm
Permanent membrane damage
Increased salt passage
Carbon Filter
Fusion² CF
series
pH
5.5 – 9.5
Internal corrosion
Lime scaling in equipment
Plumbing damage
Replace water source
Adjust pH
Call your
dealer
Organic or
Microbiological
Activity
0
Reduced production rate
Fouling of membrane surface
Sliming of pre-treatment equipment,
odour
UV Disinfection followed by 1-
micron filtration
Well chlorination
Excelight UV
Excelpure
WellPro
Manganese
<. 05 ppm
Reduced production rate
Fouling of membrane surface
Manganese Greensand Filter
Greensand
Catalox
Hydrogen
Sulphide
0
“Rotten egg” odour
Internal corrosion
Iron Remover (<1 ppm)
Manganese Greensand Filter
(> 1 ppm)
Greensand
Catalox
Turbidity
SDI < 5.0
Reduced production rate
Plugging of membrane
Rotary vane pump damage
Multimedia Filter
Pre-treatment cartridges
Nextsand
Excelpure
!
TEST THAT THE PRE-TREATMENT SYSTEM IS DELIVERING RO FEED WATER TO
NECESSARY SPECIFICATIONS BEFORE PLUMBING THE RO SYSTEM ONLINE.