12 13
ADDITIONAL PURCHASE CONSIDERATIONS
Depending on your installation and application needs, you may nd other
Aquatic Life products helpful with this RO/DI unit. Visit www.aquaticlife.com for the
complete line of Aquatic Life TI ltration products and accessories.
Float Valve Kit
(Item # 500300)
Fill large tanks, containers, and aquariums
automatically. If using this with a reverse
osmosis or RO/DI unit, you will not need
any other components, as this includes
the necessary auto shut-o valve,
check valve and tubing.
TI Deionization Cartridge
Value 4-Pack (Item # 330390)
Always have a new color-changing resin
cartridge on hand plus save money with
the Value Pack. Each pack includes four
cartridges, making it easy to stock-up
for your ltration needs.
Buddie Fit™ Press Fittings
Easily plumb ¼" water units with these
press-t connectors. Available in a variety
of connections that include adapters to
threaded ttings as well as elbows, tees
and check valves.
Tubing – 50 Ft rolls
Blue (Item # 500297) Red (Item # 500298)
Yellow (Item # 500299)
Ideal for applications where a longer run
of tubing is required. This ¼" polyethylene
tubing is durable, exible and easy to plumb.
Available in blue, yellow and red for
quick identication of supply, waste
and ltered water.
REVERSE OSMOSIS
FILTER BASICS
The membrane does most of the work
by removing up to 95% of the TDS from
your water. The sediment and carbon
lters protect the membrane from the
many malicious elements that shorten
its life. The sediment cartridge removes
suspended particles larger than 5 microns
(3 times smaller than a mold spore). The
carbon block removes chlorine. Timely
replacement of the cartridges will increase
the membrane’s life.
The carbon cartridge is the most important
cartridge to change frequently. The carbon
cartridge can lter about 2,500 gallons of
water before being replaced IF your chlorine
level is 1 ppm (parts per million). With a
2 ppm you can lter 1,250 gallons of water
before needing to change, with a 3 ppm
you can lter 833 gallons, and so on. Any
chlorine not absorbed by a spent carbon
cartridge will break down your membrane,
thus greatly shortening its life.
The 2,500 gallon threshold is TOTAL water
that passes through the unit. The Twist-In
RO Unit has an average rejection ratio of
1:3.5. That means for every 1 gallon of good
water produced you will reject 3.5 gallons
for a total of 4.5 gallons of water passed
through the unit. At 1 ppm of chlorine, you
can make about 650 gallons of good water
before changing the carbon cartridge, 2 ppm
you can make about 325 gallons, 3 ppm you
can make about 217 gallons, and so on.
When the sediment cartridge needs to
be changed, the production of water will
reduce. Even with reduced water production,
the cartridge will not allow anything larger
than one micron to pass through the
chamber. On average the sediment cartridge
should be changed at every other carbon
change.
With proper lter changes, the membrane
could last up to two years. The membrane’s
water production rating is based on 77°F
water at 65 PSI. Any deviation from this
will aect the water production. Reference
the conversion table below. You will notice
that the warmer the water, the better the
production. It is not advised that you
introduce water from your water heater to
increase water temperature. The membrane
cannot handle temps over 100°F.
Example
An RO membrane production rate at
77º F, 65 PSI = 100 gallons per day.
What is the production rate at 50º F?
Answer
Use the temperature correction factor
(from table above) = 0.58
New production ow rate at 50º F
is 100 x 0.58 = 58 gallons per day.
The color changing mixed bed resin DI
cartridge will absorb the remaining TDS not
ltered by the membrane. When mixed bed
resin is new, it is a blue green color. When
it gets wet, it will change a dark blue color.
When the medium is spent it will change to
a light brownish tan color.
Temperature Correction
Temp.
F/C
Correction
Factor
50/10 0.58
60/16 0.73
70/21 0.87
77/25 1.00
80/27 1.06
90/32 1.23
100/38 1.45
Pressure Correction
Pressure
PSI
Correction
Factor
10 0.17
20 0.33
30 0.5
40 0.67
50 0.83
65 1
70 1.17
80 1.33