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c) Tank pressure is too low, never reaching the pressure requirement to shut the pump. Empty
the tank and set it between 7-10 PSI and reconnect.
Section 4: Glossary and Terms to Know
Add-On Kit (#ACL1): Filter add on kit for adding additional in line filters to an existing system. Comes
with quick-connect elbow fittings, filter clamps, and additional tubing
Alkaline Remineralization Filter* (#FA15): 6th stage. Remineralizes the RO water and neutralizes the pH
Auto Flush Solenoid Valve (#ASOF7): Automatically flushes the RO membrane to preserve membrane life
and efficiency
Booster Pump (#PMP5): 24 volt booster pump used by residential iSpring RO systems
Check Valve (#ACV1K): One way valve that does not allow water back into the membrane housing. Looks
like a standard elbow fitting and is located on the “Pure” water port of the membrane housing
CTO Carbon Block Filter (#FC15): 3rd stage. 5 micron 10” carbon block filter. Further removes any
residual chlorine, tastes, and odors before the water reaches the RO membrane
Drain Saddle (#ADS1): Attaches to your under-sink drain pipe to secure the drain tube coming from the
system
Drinking Faucet (#GA1-BN): The output source for the RO water. The faucet is a non-air gap faucet with a
¼” tubing connection. The optimal sized counter-top hole for the faucet is ½”, but holes up to approximately
1 ½” will work
Elbow Fittings (#4044K): Quick connect elbow fittings used on the system (except for on the membrane
housing and cap). ¼” tubing connection and ¼” NPT male thread
Elbow Fittings on Membrane Housing (#4042K): Quick connect elbow fittings used on the membrane cap
and drain port of the membrane housing. ¼” tubing connection and ⅛” NPTF male thread
Feed Water Adapter (#AFW43): Goes in line with your cold water line and branches off a water supply
line to the RO system. Can adapt to ⅜” and ½” cold water lines
Feed Water Solenoid Valve (#ASOW7): Opens the water supply to the booster pump when the low
pressure switch and high pressure switch are both on. Shuts off the water supply when one or both turn off
Flow Sensor Switch* (#FSS): Detects water flow to turn the UV filter on and off as needed
GAC Filter (#FG15): 2nd stage. 5 micron 10” granulated activated carbon filter. Removes chlorine, tastes,
and odors from the water
GPD: Gallons Per Day
High Pressure Switch (#ALP1): Receives pressure signals from the pressurized storage tank. Turns on
when the tank pressure is below 20 PSI and turns off when tank pressure reaches 35 PSI (e.g. tank full)
Housing Wrench for Membrane Housing (#AWR1): Housing wrench used to screw on and unscrew the
membrane housing cap
Housing Wrench for Stages 1, 2, and 3 (#AWR2): Housing wrench used to screw on and unscrew the
stage 1, 2, and 3 filter housings
Ice Maker Kit (#ICEK): Add on kit that allows you to run water from the system to your fridge ice maker
or fridge water dispenser
Leak Stopper (#ALS1): Protects from any possible leaks by cutting off the water supply when the sponge
absorbs water
Low Pressure Switch (#ALP1): Turns on when the source water pressure reaches 7 PSI, turns off when
source water pressure drops below 7 PSI
Membrane Housing and Cap (#NW12): Horizontal housing that the RO membrane is inserted into
Membrane Housing O-Ring (#ORM): 2 ½” O.D. O-ring used to create the seal between the membrane
housing and the membrane cap
Page 23 www.123filter.com | (678) 261-7611 | [email protected]
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