Ispring US31 User manual

Copyright ©2005-2019 ISPRING WATER SYSTEMS, LLC. All rights reserved.
US31 USER MANUAL Ver.04/2019

System Installation
Prior to Installation
Inspect the package
Open the box and remove all of the components. Inspect them to ensure nothing was
damaged during shipping. If any part is cracked or broken, please immediately contact
iSpring Customer Support for a replacement.
Recommended tools list
●Variable speed drill with two bits: ¼” (for drilling a hole on PVC drain pipe), ½”
hollow diamond (for drilling a hole on countertop for drinking faucet)
●5/8”, 9/16” open-end wrench, or adjustable wrench, pliers
●Phillips head screwdriver
●Scissors or utility knife
Component Identification
Housing
Filters (PP+ CTO + CTO)
Drinking Faucet
Feed Water
Adapter(AFW43)
Fittings and tubing
Teflon tape, Wrench,
Faucet hanger

Step 1 –Faucet Install(Standard Non-Air-Gap Faucet)
Be sure to turn off the cold water line before you start.
1. Most sinks have an extra hole for the mounting of additional faucets, sprayers or
soap dispensers. If your sink does not already have an additional hole, you will
want to drill a ½” hole for the drinking faucet.
2. Once the hole is prepared, assemble the parts of the faucet that belong above
the sink. First is the faucet spout. Some faucet spouts have threads; most do
not. It is not necessary to tighten the faucet spout, and is preferable to let it move
freely so you can move it out of the way when you wish. Insert the faucet stem
into the hole in the faucet body. No plumber's putty is needed since the small
round rubber washers provide
the seal.
3. The large chrome base plate
goes underneath the faucet
body, then the large black rubber
washer.
4. From under the sink, slide the
thick black washer on first
followed by the lock washer.
Tighten firmly into place once the
faucet is properly aligned.
Step 2 –Install Water Supply Connector
1. Turn off the cold water line under the sink. Open the kitchen faucet to release
any pressure and make sure the water has stopped before proceeding. Get a
towel or bucket to catch any water drips.

2. Disconnect the water supply line
from the cold water connection
underneath the sink. Wrap the male
end of the water supply connector
with 3-4 wraps of Teflon tape to
ensure a proper seal. Screw the
female side of the feed water
adapter onto the cold water line
first, and then screw on the cold
water line to the male end of the
feed water adapter. Ensure a
proper seal, but do not over-tighten.
3. When the handle of the feed water
adapter is turned perpendicular to
the water line, this is the "OFF"
position. When in line with the
water line, the connector is “ON”.
Step 3 –Install Filters
1. Make sure the O-ring is seated inside the
groove on top of the filter housing. A light
amount of food-grade silicon jelly may be
used to help the O-ring seal better, but is
not required.
2. The filter cartridges are preserved in shrink
wrap. Note the direction sign on the sticker
before removing the wrap.
3. When placing the filter cartridge into its
housing, make sure it is centered and the
knob protruding from the bottom of the
housing fits in the central hole of the filter.
4. Screw the housing, with filters attached, onto the housing. The cap also has a
center knob which should be inserted into the center hole of the filter cartridge.
Twist the housing on in a clockwise direction by hand, and then use the housing
wrench to tighten it another 1/4 –1/2 of a turn. Do not over-tighten. This can
cause leaks and make it difficult to unscrew the housing when replacing
filters. Follow steps 1-4 to install the rest of filters.

Step 4 –Fitting and Tube Connections
1. Fittings: Wrap the male end of the fittings with 4-5 wraps of Teflon tape to
ensure a proper seal, and then screw them into each side of the system. Do not
over-tighten.
2. Supply Tube: Insert the tube into the fitting until you reach the ⅝” mark on the
tube. Pop the blue lock clip back on the fitting. This will lock the tube in place and
prevent it from moving.
3. Faucet Tube: Slide the brass nut and tube collar onto the tube.Fully insert the
tube insert into the end of the tube. Slide the tube collar towards the tube insert
until it stops. Insert the tube into the tapered, open end of the threaded metal
inlet. Screw on the brass nut and tighten it up. The brass nut compresses the
plastic tube collar onto the tapered metal surface and creates a water seal
between them while the tube insert stiffens the tubing.
Installation Tips
How to use the Quick-Connect fittings
To connect:
1. Check and cut the tubing end squarely and cleanly with utility knife or scissors.
2. Make a ⅝” mark at the end of the tube so you will be able to confirm when the
tube is inserted fully into the fitting.
3. Remove the blue lock clip from the fitting
with your nail. If the lock sleeve pops out
of the fitting when doing this, simply pop it
back in.
4. Insert the tube into the fitting until you
reach the ⅝” mark on the tube. You will
feel resistance when the tube reaches the
small rubber O-ring inside the fitting. You
will need to wiggle the tube and apply
additional pressure to get it past this O-
ring and create the seal. If the tube is
not ⅝” into the fitting and past the O-
ring, no seal will be created and
leaking will occur.
5. Once the tube is fully inserted into the fitting, pop the blue lock clip back on the
fitting. This will lock the tube in place and prevent it from moving.

To disconnect:
1. Remove the blue lock clip from the fitting.
2. With the blue lock clip removed, use your thumb and
index finger to hold down the lock sleeve. This will
release the metal teeth holding the tube in place.
While holding the lock sleeve down with that hand,
use your other hand to remove the tube from the
fitting.
Step 5–System Start-Up
When everything is in place, open the
drinking faucet and lock it open. Slowly
open the water supply connector and
allow water to flow into the unit,
eventually exiting through the faucet.
Check for leaks.
Allow the faucet to remain open to
rinse the unit for at least five minutes. It
is normal to see residual carbon and
fine air bubbles in the water when
flushing the system for the first time. If
the faucet drips a bit when closed, this
is also normal for the first couple of
days and is the result of pressure from
trapped air. This too shall pass.
*Check for leaks daily for the first week and occasionally thereafter.

Step 6 –How to Change Filters
1. Shut off the cold water supply valve. Place a bucket or towel under the system to
catch any water spills.
2. If there is enough room under the sink and the filter system is hung on the wall,
you can twist the filter housing off without removing the system from the wall.
Otherwise, you will need
to pull the system out, lay
it down, and remove the
housing at that point. Be
careful with the tubing
connections when
removing the system.
3. Twist off the filter
housings in a counter
clockwise direction using
the filter housing wrench.
4. Refer to installation Step
3 to install the new
vertical filter cartridges,
and tighten the filter
housings back on.
Remember not to over-tighten them or they will be hard to unscrew next time.
Average Maintenance Schedule
Cartridge Description
6 Months
1 Year
2-4 years
Sediment Filter
Carbon Block Filter

Warranty Registration
To register your product for the warranty, please visit our website at 123filter.com and
go to the “Warranty Registration” tab.
We provide a 30-day money back guarantee, a 1-year manufacturer warranty, and
lifetime tech support for all of our products. However, we do not have the order
information from websites other than 123Filter.com (Amazon, Home Depot, etc.), so
please be sure to fill in that information upon registration of your system. If you have any
questions or concerns about your product, please do not hesitate to call or email us, or
put it in the notes/comments upon your warranty registration. Your satisfaction is our
business!
If you are happy with our products and service, please show your support
by writing a product review on Amazon. Even just a single line takes you
just a minute, but means a lot to us. Thank you!
Contact Us
Office Hours: Monday-Friday, 8:30 am - 5:30 pm EST
Phone: [phone]
Email: [email protected]