AquaFX The AquaFX Blue Marlin 1000 Gallon Per Day Reverse Osmosis - Manual (Page 3)

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Filter Change Sheet and Normal Operation
Note: Filters are referenced in the order in which they appear in the system.
1. Sediment Filter: is first in line; it removes particles that can be physically filtered out. An example of a particle
that is removed is sand. This filter’s life depends on the amount of particles in your water. The best gauge of
this filter’s life is pressure drop. When you see a 5PSI drop, you should change this filter. Discoloration is also
a sign that the filter is loaded and therefore it is time to replace it.
2. Carbon Block Filter: This filter effectively reduces VOC’s (Volatile Organic Compounds) Water that is
considered safe by the Federal Safe Water Drinking Standards should only be used. If you have water with a
known containment, you need to treat it according. The only cost effective way to predict filter life is by
estimating the gallons. (unless carbon is being used for a know containment, then testing is essential) The
carbon block will filter 3,750 gal @ 1.0 GPM of 2ppm Chlorine (Cl
2
). Do not exclude drain water from this
calculation, as it has been carbons treated .
3.
4. Reverse Osmosis Membrane: This is the first component in the RO system that reduces Dissolved Solids; a
common example of dissolved solids can be salt or sugar. A TDS meter is the best way to determine if your
membrane is operating properly. A properly operating membrane will give you a TDS reduction of at least 90%.
EXAMPLE: Raw water TDS is 100ppm, after the membrane it should be 10ppm or less. Membranes can fail
by Clogging or Scaling, causing little or no water to be produced. Membranes will also fail from contact with
chlorine, which can result in higher production of “Membrane Permeate”. At this point the water quality will be
very poor. So changing the carbon filter on time is essential. Hot water will also ruin a membrane (>95 Deg. F).
If your membrane produces significantly more than it is rated for, that is an indication that something is wrong.
5. Deionization Filter (DI): The DI filter is the last filter inline. This filter consists of 2 resins. One is charged with
Hydrogen (H+) and the other a Hydroxide ion (OH-). As water passes over these resins, the remaining “salts”
(or ions) exchange out and only H+ and OH- are released into the stream. Due to the quality of resin used, the
water you get will be, literally as pure as possible. The resin is a color indicating resin; it will slowly change from
a dark purple/blue/black to a rust red/orange color. As this filter nears the end of its useful life you may
experience “break though”. Keep this in mind, depending on the water quality needed. For applications
demanding 18 Mega-Ohm water, 2 DI’s are STRONGLY recommended. As the first DI filter becomes
exhausted, replace it with other
DI already installed in the system downstream. You can then proceed to install the brand-new (not installed yet)
DI Filter in the last canister. This assures the water quality you desire.