Ispring PH100 Installation Instructions & Owner's Manual page 22

Note: If the housing is too tight to open, try unplugging the fitting
or tubing in order to release the air and water pressure inside the
housing.
e. After opening the housing, remove the used filter and put the
new filter into the housing. Make sure the O-ring is in place, turn
the housing counter clockwise to close, and tighten.
f. Repeat the previous step on the second filter change.
g. Turn on the water supply and make sure there are no leaks.
h. Let the water drip from the faucet for about 10 minutes. A water
flow of less than 1 cup (8 oz. or 240 ml) per minute may indicate
that it's time to replace the RO membrane cartridge.
i. Membrane change procedures:
• Unscrew the cap of the membrane housing.
• Slide out the used membrane and discard it.
• Insert the new membrane with two O-rings into the
• Screw the cap back onto the membrane housing,
• It may take 10–20 minutes for the new membrane to run
When the water flow is optimal, turn on the tank ball valve. After
one minute, turn off the RO faucet and complete the filter change
procedures.
iSpring Water Systems
housing first, then the end with black brine seal around
the membrane. Be sure it is fully seated into the bottom
end. See the following picture or Step E.) RO Membrane
cartridge Installation for more details.
making sure the O-ring is still in place.
at a normal flow rate.
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