
IF YOU NEED HELP OR HAVE A QUESTION, WE’VE GOT YOU COVERED. GIVE US A CALL AT 877.333.7108
Replacement Manual
REMINERALIZER
FOR USE WITH AO-US-RO-4000
AO-US-RO-RM-R

NEED HELP? GIVE US A CALL 877.333.7108
INSTALLATION GUIDE
2
1. Turn off COLD water valve. Release pressure from system by turning on dedicated faucet
until water stops owing.
2. Unbox remineralizer replacement and remove plastic.
STEP 1 Prepare for Installation
STEP 2 Remove Remineralizer and Disconnect Tubing
1. Once the water tank is drained and
the system is no longer under pressure,
remove the 3/8" tube from the inlet
and outlet of the remineralizer. Do so
by pushing and holding down the collar
while removing the tubing.
2. Discard the old reminerazlier cartridge.

NEED HELP? GIVE US A CALL 877.333.7108
INSTALLATION GUIDE
3
STEP 3 Reconnect Tubing and Install New Remineralizer
1. Insert the white 3/8" hose attached to
the faucet into the outlet connection of
the new Remineralizer by pressing the
hose in until it stops.
2. Connect the remaining hose end
(which has the opposite end connected
to the RO Manifold outlet labeled
“Faucet”) to the inlet portion of the
Remineralizer by pressing the hose in
until it stops.
Note: Be sure both tubes are inserted all
the way.
STEP 4 Flush and Check for Leaks
1. Turn off the dedicated faucet and turn on the cold water supply. Allow water tank to
rell completely.
Note: It will take 2 hours for the water tank to rell.
2. Once the tank has completely lled, inspect for leaks. If there are no leaks, ush the
remineralizer cartridge by turning on the dedicated faucet and allowing water to run
through the system until there is no pressure coming coming out of the dedicated
faucet.
Note: Do not drink ushed water.
3. Turn off the dedicated faucet and allow 2 hours for the pressure to build in the system.
Once complete, your system is ready for use.

A. O. Smith Corporation
11270 W Park Pl #170, Milwaukee, WI 53224
877.333.7108
• Rated capacity: 12 months depending on contaminant levels & usage.
Care
To clean system manifold, wipe exterior with a damp cloth. Do not use any strong abrasive
cleaning agent or solvent cleaner.
NOTICE
Safeguards
• If you experience a hose connection leak, disconnect and re-set the hose.
• Do not use with water that is microbiologically unsafe or of unknown water quality
without adequate disinfection before or after the system.
• Systems certied for cyst reduction may be used on disinfected waters that may contain
lterable cysts.
CARE & SAFEGUARDS
4
Scan to view the AO-US-RO-4000 replacement video.
