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Can I add an additional filter to my existing system?
Yes, to add an additional filter onto an existing system you will just need the filter itself and a filter
add-on kit. The most common filter to add is the alkaline remineralization filter, which has the
model number “FA15”. The add-on kit comes with elbow fittings, filter clamps, and tubing, and the
model number is “ACL1”.
What is the drain to pure water ratio?
The ratio of drain water to reverse osmosis water ranges from 1:1 to 3:1 depending on water
pressure, water temperature, size of membrane used and the contamination level of the water
source. A toilet flush uses about three gallons of water, so on average the daily system drain water
is equivalent to an additional flush of the toilet per day. The drain water is up to twice as
contaminated as the tap water going into the system, as all of the contaminants that the system
rejects are concentrated in this water.
How to check and adjust the tank pressure if needed
When empty, the tank pressure should read between 7 and 10 PSI. The tank bladder comes pre-
pressurized, so there is no need to adjust the pressure on the tank when you receive the system.
Occasionally, the tank bladder may lose pressure over time. To check this, remove the blue cap
covering the air nozzle on the bottom half portion of the tank. The tank pressure can then be
checked with a standard tire pressure gauge. If the tank is over inflated, you can let air out at this
point until you are within 7 and 10 PSI. If you need to add air to the tank, you can do so with a
standard bicycle pump.
www.123filter.com | (678) 261-7611 | support@123filter.com Page 20
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