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5)  Firmly pull the module away from the head.  (It may be 

 

necessary to twist the module slightly from side to side.)

6)  Remove the new RO membrane module from its protective 

wrap.  (Double check to see that it is the correct replacement by  

comparing the labels.)  

7)  Remove the sanitary plastic cap on top of the module.

8)  Ensure both o-rings are present on the replacement filter and are 

seated into grooves; moisten o-rings with water.  DO NOT use any 

petroleum products to lubricate the o-rings.

9)  Connect the new red SFC reject tubing (supplied with replacement 

membrane module) by inserting it into the fitting at the bottom of 

the new RO membrane module as far as it will go, and into the 

faucet adapter.  Line up the module ears, insert the module and 

push it into the head until it is fully seated.  Twist the module 1/4 

turn to the right (clockwise) to lock it into place.

10)  Open the cold water feed valve, and carefully check for leaks.  Carefully 

inspect the fitting at the bottom of the new RO membrane module.

11)  For sanitization of RO system please follow instructions below in 

Section D.

12)  Flush membrane module - refer to Section M, Step 1 and 2 on 

page 8.

D.  SANITIZING THE RO SYSTEM

Follow the sanitizing procedure for the storage tank and the filtration 

assembly outlined below, followed by 24 hour flush with tank empty 

and faucet open.

To help provide you with the highest quality water from your RO 

Drinking Water Filtration System, it is important to routinely sanitize 

both the storage tank and the filtration assembly as noted below.

IMPORTANT NOTE:  These procedures are only intended to be part of 

a routine maintenance program only and are not designed to sanitize 

systems that have become highly contaminated from misuse.

When to Sanitize the Storage Tank

• 

Upon start-up as described in the beginning of this manual.

• 

After any servicing or routine maintenance which involves the RO 

 

membrane module, carbon block post-filter, storage tank or faucet.

When to Sanitize the Filtration System

• 

After any servicing or routine maintenance which involves the 

 

sediment and granulated carbon replacement filters or the RO    

 

membrane replacement module.  

How to Sanitize the Storage Tank and Filtration System

Sanitizing the storage tank generally requires:

• 

Common household bleach (5.25% non-scented)

• 

Eye dropper or plastic oral syringe

1)

  Close the cold water feed valve and lift up on the faucet handle to  

 

empty the water in the storage tank.  It should feel light when  

 empty.

2)

  Disconnect the 3/8” yellow tubing (system tank) from the ball 

valve on top of the storage tank.

3)

  Insert into the yellow tubing 1/2 teaspoon (3 ml) of household 

bleach.  (See Fig 8)

4)

  Reconnect the yellow tube to the tank ball valve.

5)

  Close the RO faucet and open the cold water feed valve.

6)

  Wait 4-5 hours.

7)

  Life up the handle of the RO faucet and allow contents of tank to 

drain completely into the sink.

8)

  Sanitizing is now complete.

9)

  If there is any residual chlorine/bleach taste in the next tank full, 

drain tank completely a second time.

E. LONG TERM NON-USE

 

If the RO system is to be left unused for a long period of time  

(greater than 30 days), install new replacement filters.

11

Remove the red SFC tubing from

the fitting before completely

removing the RO membrane module

Fig. 7

WARNING

To reduce the risk associated with ingestion of water contaminated 

with sanitizer:

  • After installation, sanitizers 

must

 be flushed from the system 

before first use as directed within the installation instructions.

Summary of Contents for 3MRO401

Page 1: ...dration Hot and cold beverages Cooking and food preparation Pet hydration Aquatic aquariums Optimized For Reduction Of Select Volatile Organic Compounds VOCs System tested and certified by NSF Interna...

Page 2: ...to small parts during the installation of this product To reduce the risk associated with ingestion of contaminants Do not use with water that is microbiologically unsafe or of unknown quality without...

Page 3: ...system Where a booster pump is installed on a water system you must install an appropriate pressure relief valve Pres sure relief valve must be maintained and inspected every 6 months Contact a plumbi...

Page 4: ...ing location 5 D Make the faucet mounting hole 5 E Mount the faucet 6 F Prepare the system for installation 6 G Install the feed water connection and tubing 7 H Prefill and sanitize the storage tank 7...

Page 5: ...nothing will interfere with mounting the faucet such as reinforcing ribs support brackets or the cabinet construction If drilling a hole in your sink is required the professional installer should foll...

Page 6: ...Gap is provided by hole 1 above faucet base 1 Familiarize yourself with all of the components shown in the air gap faucet diagram See Fig 2 2 Slide the chrome base plate and rubber washer up the thre...

Page 7: ...y and the tank valve Disconnect the orange and yellow tube from the union connector setting the tank aside while proceeding with the rest of the installation the sanitizing solution should be kept in...

Page 8: ...ween the sink basins for ease of access if space permits K MAKE THE TUBING CONNECTIONS With all of the components in place the tubing connections can be made When routing the tubing between the compon...

Page 9: ...The drain line has a loop in it Air is locked in the air gap outlet There is excessive RO reject flow Solutions Check to see that the drain line is clear of any obstruction and remove the drain saddle...

Page 10: ...ed valve Wait five 5 minutes for the filtration assembly to completely depressurize 2 Remove cover 3 Twist the existing filter 1 4 turn to the left so that the ears on the filter are able to disengage...

Page 11: ...ly and are not designed to sanitize systems that have become highly contaminated from misuse When to Sanitize the Storage Tank Upon start up as described in the beginning of this manual After any serv...

Page 12: ...tion Inc will replace the Product or refund your Product purchase price This warranty does not cover labor The remedy stated in this paragraph is Customer s sole remedy and 3M Purification Inc s exclu...

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