Step 7: Tubing Hook Up (Optional Sub-Steps Are Marked With * ) - Ispring RCS5T Installation Instructions & User Manual

Step 6. a. Open the membrane housing cap. A thick rubber band can be slipped on the housing
body for better grip.
Step 6. b. Find the inner end with 4 O-rings, cut open the end of the sealed bag, use it to hold
the RO membrane to avoid contamination, and firmly insert the membrane into the housing
until the outer end with only 2 O-rings is completely inside the housing. See Figure above.
Step 6. c. Before twisting the housing cap back on, check that the O-ring is evenly snagged
on the membrane housing (cap does NOT have an O-ring). Hang tight and tighten up for
about 1/4 – 1/2 turns using a small plastic housing wrench, but do not overtighten. DO NOT
reconnect the tubing to the inlet on the cap at this point (will do it in system startup).

Step 7: Tubing Hook Up (optional sub-steps are marked with * )

Step 7. a. Facing the iSpring logo upfront, locate the pre-filter 1st stage on the right-hand side.
Connect the 3/8" tubing between Feed Water Adapter (AFW) and point A.
Step 7. b. Connect the Flow Restrictor (point C), a 3" long cylinder with a FLOW sign beside
the membrane housing, to the black Drain Saddle with 1/4" tubing.
Step 7. c. Connect the Post Carbon Filter FT15 5th stage (point B) to the RO faucet with 1/4"
tubing.
Step 7. d. 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 the tank
shut-off valve.
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