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Visually check the entire system for leaks. If a leak is present, see
CAUTION:
Troubleshooting on page 11.
(A) Turn off valve at top of storage tank.
(B) Turn on the cold water supply, and ensure the supply adapter valve is open.
(C) Lift the faucet handle to lock it in the open position and let it drip for 30 min.
(D) Completely open the cold water supply until it comes to a stop. Allow water
to drip from the faucet for 12 more hours. Then close the faucet and open the
valve on the storage tank. The tank valve is open when the handle lines up with
the tubing connection.
(E) Allow 3 hours for the tank to fill. Continue to periodically check the installation
for leaks. After the storage tank is filled, open the faucet to flush the post-filter
cartridge. Allow 4 to 5 minutes for all of the water to drain from the tank. Close
faucet and allow tank to fill.
(F) Repeat step E four times.
NOTE: Initially, the water may appear cloudy. This is a result of air trapped in the
post-polishing filter. It is not harmful and will disappear in a matter of
minutes. It may take up to a week after installing a new post-polishing filter
for the trapped air to dissipate.
The system is ready for operation. You can now enjoy quality water from your
Reverse Osmosis System.
TESTING YOUR REVERSE OSMOSIS SYSTEM
Model GRO-475 Reverse Osmosis System
Total Dissolved Solids (TDS) Test
NOTE: It is highly recommended that you (the consumer) have your water
tested at least every 12 months to verify that your system is performing
satisfactorily.
Counter-clockwise
RAIN GRO-475 Installation and Operation Manual • 7
A
Push Down
Push Up
B
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