Instructions / Assembly

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Step 7: Tubing Hook up (optional sub-steps are marked with * )
7.1 Facing the iSpring logo up front, the pre-filter 1st stage is located on the right hand side. Connect the
3/8”
tubing between Feed Water Adapter (AFW) and point A.
7.2 Connect the Flow Restrictor (point C) , which is a 3-inch long cylinder with a FLOW sign laying beside the
membrane housing, to the black Drain Saddle with ¼” tubing.
7.3 Connect the Post Carbon Filter FT15 5
th
stage (point B) to the RO faucet with ¼” tubing.
7.4 * If you have a RO storage tank, replace the elbow fitting at point D with a Tee fitting, reconnect the tubing
from the check valve to one T, and connect the other T with tank shut-off valve.
Step 8: System Start Up (optional sub-steps are marked with * )
8.1 Make sure that all tubings are not kinked. Prepare a bath towel and bucket to catch water drips.
8.2 To avoid the residual carbon dust in the first three stages from getting into the RO membrane, remove the
tubing to the inlet of the RO membrane housing cap. Flush the first three stages into bucket until the water
turns clear, and re-connect the tubing to the RO membrane. You may do this whenever you change the first
three stages. (Optional: disconnect the storage tank if you have one)
8.3 Plug in booster pump power. Turn on Feed Water Adapter valve (AFW), and then slowly turn on the cold
Water Supply Valve (WSV). Finish flushing the first 3 stages, and then reconnect the tubing to membrane
housing cap.
8.4 Check for leaks. The top 3 causes for leaks are 1) the tubing was not fully inserted into the quick-connect
fitting. 2) the O-ring was not in place or kinked. 3) the Housing/Cap was not tightened up or off threads.