Instructions / Assembly

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The ASOV is the automatic shut-off valve. This valve allows the system to automatically turn off
the water supply using pressure from the pure water side of the system. The ASOV is a critical
piece to the system as it saves water, extends filter life, and improves the performance of the unit.
As the storage tank fills, the tank pressure increases. When the tank fills completely, a pressure
signal is sent to the ASOV, and the water supply to the system is shut off.
Does the UV filter run 24/7? Will the water out of UV filter be hot?
The iSpring UV filter features a Smart Flow Sensor Switch on the tubing connected to the UV
housing. This switch communicates with the UV transformer to turn the UV on and off with water
flow, conserving power and extending the life of the bulb. The UV remains on for an additional
two minutes after flow has stopped to pre-sterilize the water in the system for the next time it is
used. So in short the UV filter only powers on when needed, and does not heat the water up.
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 is approximately 3:1. This will depend on water
pressure, water temperature, 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.
What should I do with the system when going out of town?
When you are leaving for an extended period of time, you will want to shut off the water supply to
the system and empty the tank. To do this, close the knob on the feed water adapter, and open the
faucet until it stops running. This will signify that the tank is empty. If you are going to be gone for
more than a week, you will also want to remove the RO membrane and store it in a damp Ziploc
bag in the refrigerator. The RO membrane is a “wet” membrane, meaning it cannot dry out. Storing
it in a damp Ziploc bag in the fridge will ensure this does not happen. This will keep the membrane
fresh for 1-2 months.