ISPRING US31-NC (01) PDF DOCUMENT

The user must adhere to the installation specifications described in the instruction manual. The following guidelines should be followed:

This product is designed for residential use only. For non-residential settings, please contact customer service.

The operating temperature range is 40°F – 100°F (4 – 37 °C). This system is NOT designed for HOT water. If the water or ambient temperature falls below 40°F, immediately shut off the inline water supply and drain the remaining water.

Use only authorized iSpring parts and filters. Using unauthorized or aftermarket components will void the product warranty.

It is recommended to check external fittings and connections regularly to ensure all components are secure and operating properly.

Unauthorized modification and disassembly are strictly prohibited and will void the warranty.

This system is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning the use of the appliance by a person responsible for their safety. Children should be supervised to ensure they do not play with the appliance.

Do not use this system with microbiologically unsafe water or water that has been potentially inadequately disinfected.

The installation must comply with applicable local plumbing codes and/or regulations.

This purification system DOES NOT reduce TDS concentration.

Note: For high inlet water pressure exceeding 70 psi, a pressure regulator (Model: APR70) is required. For minimum water pressure below 30 psi, a booster pump is needed.

Required tools:

Plumber’s Tape

Phillips Head Screwdriver

Spanner Wrench

Utility Knife

Flash Light

Towels

Optional tools:

Variable speed drill with two bits: 1/4″ (for drilling a hole on PVC drain pipe), 1/2″ hollow diamond (for drilling a hole on the countertop for drinking faucet)

5/8″, 9/16″ open-end wrench, or adjustable wrench, pliers

Cut the tubing end squarely using a utility knife or scissors.

HOW TO CONNECT:

1. Push the tubing into the quick connect fitting.

2. Insert the tubing for at least 1/2″ to ensure it is secure. You will need to wiggle the tube and apply additional pressure to create a seal.

3. The tubing is locked in place.

HOW TO DISCONNECT:

1. Remove the blue locking clip if present.

2. Press and hold down the collet (the ring the tubing goes into).

3. While pressing the collet, pull the tubing out to disconnect it.

A. Turn off the Cold Water Supply Valve (CWSV) under the sink and open the kitchen faucet to release pressure. Prepare a towel or bucket to catch any water drips. Disconnect the kitchen faucet connector pipe from the CWSV.

B. Install the Feed Water Adapter onto the CWSV and tighten it using a wrench or pliers. Make sure the O-ring is seated inside the adaptor.

C. Re-install the kitchen faucet connector pipe onto the male end of the Feed Water Adapter. Turn the handle of the Feed Water Adapter to the perpendicular OFF position. Turn on the CWSV slowly, and ensure you are getting a proper seal.

D. Connect the 1/4″ tubing to the Feed Water Adapter.

Note: The included bushing can be threaded on either side of the Feed Water Adapter to fit the configuration of both 3/8″ COMP and 1/2″ NPT.

A. If drilling a hole to install the faucet:

a. If your kitchen sink does not have an existing 1/2″ faucet hole, you will need to drill one. Wipe the area clean and dry.

b. Slip the front plate on the faucet stem, followed by the front washer. Insert the faucet stem into the hole on the countertop. Under the sink, slip on the back washer, and tighten the nut with the lock washer wing nut.

c. Slide the quick fitting up to the push-in adapter on the base so that it seats securely into the faucet stem, then lock it in place by sliding the blue clip under the collet of the quick fitting.

d. Insert the tubing about 1/2″ into the push-in fitting, and again, secure it with the clip.

B. To install a faucet bracket instead of drilling a hole (Optional):

a. Mount the bracket to the sidewall of the cabinet.

b. Insert the faucet stem into the hole on the bracket. Slip on the back rubber washer.

c. Tighten the nut with the plastic wing.

d. Insert the tubing about 1/2″ into the push-in fitting and secure it with the clip.

1. Choose a 1/2″ Diamond Core Bit for granite and a titanium drill bit for steel. Do NOT use a hammer drill on natural stone, glass, and ceramic.

2. An indent should be made with a punch on steel before drilling to help guide the bit.

3. Use caution when drilling on a Porcelain sink, as it could be easily chipped. Set drill speed on slow. Press the bit downward firmly until it breaks through the slippery surface.

4. Use a coolant to disperse heat. Choose water for granite and oil for steel. Use a Water Suction Cup to hold coolant inside and prevent the drill bit from slipping.

5. Hold the drill firmly and vertically at the slowest speed to prevent the drill bit from slipping on the counter.

6. Once you break through the smooth surface, swirl the drill a little to evenly apply pressure in a circle. Be patient and deliberate. It can take 20 – 40 minutes to drill through 1″.

Step 3: Install the Filters (Stage 1, 2, and 3)

A. Make sure that the O-ring is seated inside the groove at the top of the filter housing. Food-grade silicone jelly may help the O-ring stay in place and seal better.

B. Filter cartridges are preserved in shrink wrap. Note the direction sign on the sticker before removing the wrap.

C. 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.

D. Screw the housing, with filters attached, onto the housing caps. The cap also has a center knob that should be inserted into the center hole of the filter cartridge. Twist the housing on in a counter-clockwise direction by hand, and then use a housing wrench to tighten it up for about 1/4 – 1/2 turn. Do not overtighten, as this can cause leaks and make it difficult to unscrew the housing when replacing filters.

Note: the second stage GAC filter is the only filter that must go in a certain direction. Carefully follow the instruction on the GAC filter for reference.

Step 4. Tubing Connection

A. Install the fittings onto the inlet and outlet of the system. Wrap the male end of the fittings with 4-5 wraps of plumber’s tape to ensure a proper seal, and then screw them into each side of the system. Do not over-tighten.

B. Insert the supply tubing onto the inlet side.

C. Insert the faucet tubing onto the outlet side.

A. Make sure no tubing is kinked. Place a towel under the system to catch any possible water leaks.

B. Open the drinking water faucet. Slowly turn on the Feed Water Adapter and check for leaks. The top 3 causes of leaks are: 1) The tubing is not fully inserted into the quick-connect fitting. 2) The O-ring is not in the correct place or is kinked. 3) The Housing/Cap is not tightened properly or is misaligned with the threads.

C. Rinse the system for at least 5 minutes. It is normal to see residual carbon and fine air bubbles in the water when flushing the system for the first time.

D. Check for leaks daily for the first two weeks after installation to ensure the system is functioning properly.

a) Check if the water supply is closed. Open the water supply to the system.

b) Verify all tubing connections for incorrect installation.

c) Check all tubings for crimps that may be blocking water flow and uncrimp any you find.

a) One or more of the filters may be clogged and need replacement.

b) The water supply may not be fully opened. Open the water supply to the system completely.

In the weeks after installing the system or changing the filters, you may see many tiny air bubbles in the treated water. This can cause the water to appear “cloudy.” The bubbles will disappear as the system clears itself of trapped air and are harmless for the time being.

a) There may be an incorrect installation. Verify all connections on the system.

b) One or more of the filters has reached its lifespan and needs replacement.

a) The tubing is not pushed in past the O-ring inside the fitting, therefore not creating a seal. Make sure the tubing is pushed in a full 1/2″ into the fitting. It will take some extra pressure, but you will feel the tube go entirely into the fitting when it does so.

b) The O-ring on the fitting is not creating a seal. Unscrew the elbow fitting, and replace it with a new one. Make sure to wrap the new fitting thread 4-5 times with plumber’s tape before screwing it in.

The general filter cartridge replacement schedule is for reference only and may vary depending on the quality of your source water. The table below shows the filter order for the various US31 series models.

Recommended Replacement Cycle:

Sediment (#FP15): Up to 6 months

GAC (#FG15): Up to 12 months

CTO (#FC15 / #FC15-NC / #FC15-PB / #FC15-BV / #FC15-PF): Up to 12 months

Filters are highly suggested to be replaced when they reach their recommended replacement cycle. However, the actual lifespan of filters may vary depending on the source water quality and daily usage. If you notice a great decrease in the tap water flow, or detect an unpleasant smell, taste, and odor, it would be a good time to get your filters changed.

A. Turn off the inlet cold water valve and open the drinking faucets to release pressure.

B. With a towel or bucket underneath, twist the filter housing wrench clockwise to remove the housing.

C. Install the new filter and twist the cartridge housing back on.

D. Check the tubing connection. Open the inlet cold water valve and rinse the system for at least 5 minutes.

Replace the O-rings every 3 years or sooner if a leak occurs at the O-rings.

When you are leaving for an extended time, you will want to shut off the water supply to the system and empty the system. To do this, close the knob on the feed water adapter, and open the faucet until it stops running. This will signify that the system is empty of water. The filters should be replaced if the system is not used for over a week as they will be sitting in stagnant water.