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9

N. INSTALLATION TROUBLESHOOTING

Problem:  Leak at the drain saddle.
Possible Cause:

  Drain saddle not clamped tightly enough.

Solution:

  Tighten the drain saddle screws evenly and firmly.

Problem:  Leak at the fittings threaded connection.
Possible Cause:

  Fitting is improperly taped or not tightened sufficiently.

Solution:

  Retape the threaded portion with PTFE tape and thread it in 

firmly.  Do not over tighten.

Problem:  Leak at the fittings push-in connection.
Possible Cause:

  Tubing is damaged if there is a tubing misassembly.

Solution:

  Remove the tubing.  Squarely cut off 1/4 inch from the end 

of the tubing using a sharp razor knife and reinsert it into the fitting.  
Make sure that the tubing is pushed in completely until it seats. Refer to 
“Using Push-In Fittings” Section on page 7.

Problem:  Leak at the replacement filter head.
Possible Cause: 

 Damaged or misaligned O-ring.

Solution: 

 Close the cold water feed valve and the storage tank valve.  

Lift up on the faucet handle and drain the system a minimum of five (5) 
minutes.  Remove the replacement filter where leak is found.  Ensure 
both o-rings are present on the replacement fi lter and are seated into 
grooves; moisten o-rings with water.  DO NOT use any petroleum 
products to lubricate the o-rings. 

Problem:  The faucet leaks from the spout with the handle down.
Possible Cause:

 An obstructed or damaged valve seat in the faucet 

mechanism.

Solution:

  Call Customer Care team at 855-3M-WATER (855-369-2837) 

for assistance in attempt to repair.

Problem:  No steady drip from the open faucet after the tank is drained.
Possible Causes:

• 

The cold water feed valve is not open.

• 

A leak from any product water fitting connection.

• 

Air is still trapped in the system.

Solutions:

• 

Open the cold water feed valve completely.

• 

Correct the fitting leak as outlined above.

• 

Wait for the air to be purged from the system.

Problem:  Water leaks from air gap module opening.
Possible Causes:

• 

The drain line is blocked or the drain hole is not drilled through 

 completely.
• 

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 fitting to verify that the hole is drilled 

 through 

completely.

• 

Shorten tubing so that it is as vertical as possible.

• 

Blow air into the air gap outlet using a short length of tubing.

• 

Disconnect the red SFC reject tubing from the faucet air gap inlet 

 

tubing and check the reject flow rate.  It should be less than 5.9 

 

ounces/min.  If it is greater than 5.9 ounces/min., replace the red SFC 

 

reject tubing with the new one of proper length.

Problem:  Too little or no reject flow.
Possible Causes:

• 

Red SFC reject tubing is plugged or damaged.

• 

The cold water feed valve is not open.

Solutions:

• 

Replace the SFC reject tubing with one of proper length.

• 

Open the cold water feed valve completely.

Problem:  Chlorine or other unpleasant taste/odor is evident after the 
initial tank filling.
Possible Cause:

 Residual sanitizer is still in the water.

Solution:

 Drain and fill the storage tank several times if necessary.

Problem:  Noise in the drain (gurgling or dribbling sound).
Possible Cause:

  The reject water is dripping into the standing water in the 

drain trap.

Solutions:

• 

Make sure that the 3/8” black drain tubing from the faucet air gap 

 

module slopes continuously downward to the drain saddle without 

 

any loops or low spots.

• 

Angle the drain piping so that the reject water runs down the side 

 

of the drain pipe.

• 

Change the location of the drain saddle to the horizontal drain 

 

pipe or any alternate vertical drain pipe which is farther from the 

 

trap.  Properly plug the original hole.  

Caution:

  Make sure the drain 

 

saddle is always installed above (before) the trap.

• 

Drill larger hole in drain pipe.

Problem:  Little or no water available.
Possible Cause:

  

• 

Tank has not had time to fill.

• 

Tank has little or no air charge.

• 

RO membrane module output significantly below normal.

Solutions:

• 

Wait.  The tank will take approximately 4 hours to fill.

• 

An empty tank with the ball valve open to atmosphere, should have 
a 7-8 psi air charge.

• 

Contact our Customer Care Team at 855-3M-WATER (855-369-
2837) for instructions.

Summary of Contents for 3MRO401

Page 1: ...ion and Operating Instructions For 3MRO401 Reverse Osmosis Drinking Water Filtration System Installer Please leave manual with homeowner Homeowner Please retain for operation and future maintenance instructions ...

Page 2: ...ated with ingestion of contaminants Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system Systems certified for cyst reduction may be used on disinfected water that may contain filter able cysts EPA Establishment 070595 CT 001 To reduce the risk associated with a hazardous voltage due to an installer drilling through e...

Page 3: ...dition Where a backflow prevention device is installed on a water system a device for controlling pressure due to ther mal expansion must be installed Do not use a torch or other high temperature sources near filter system replacement filters plastic fittings or plastic plumbing On plastic fittings never use pipe sealant or pipe dope Use PTFE thread tape only pipe dope properties may dete riorate ...

Page 4: ... Prepare the system for installation 6 G Install the feed water connection and tubing 7 H Prefill and sanitize the storage tank 7 I Install the drain connection 7 J Install the filtration assembly and storage tank 8 K Make the tube connections 8 L Start up the system 8 M Flush the system and check the operation 8 N Installation troubleshooting 9 II Operation Maintenance Instructions A Important wa...

Page 5: ... be required to seal the connection If drilling is required we strongly recommend you contact a professional installer The faucet should be positioned so that it empties into the sink and the spout swivels freely for convenience Before drilling the hole always check underneath the sink to ensure that nothing will interfere with mounting the faucet such as reinforcing ribs support brackets or the c...

Page 6: ...faucet spout into where the 3 8 tubing was just removed 3 Slide the chrome base plate and rubber washer up the threaded base of faucet 4 Connect the 1 4 green tubing supplied in the installation kit to the smaller barb on the air gap faucet Push it on firmly until it seats 5 Connect the supplied 3 8 black tubing to the larger barb on the air gap faucet Push it on firmly until it seats 6 From above...

Page 7: ...ld water supply making sure the tank valve is still open and allow the tank to fill about 3 minutes 5 Close the cold water supply 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 the tank for at least 15 minutes Refer to the Using Push In Fittings sec...

Page 8: ... can be set in the front center between 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 components several guidelines should be observed Tubing runs should generally follow the contour of the cabinet rather than interfere with the cabinet storage area Strive ...

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 fitting to verify that the hole is drilled through completely Shorten tubing so that it is as vertical as possible Blow air into the air gap outlet using a short length of tubing Disconnect the red ...

Page 10: ...e 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 from the head Firmly pull the filter from the head It may be necessary to twist the filter slightly from side to side to help free it 4 Remove the new replacement filter from its protective wrap Double check to see t...

Page 11: ...d 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 in...

Page 12: ...g the warranty period 3M Purification 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 exclusive obligation This warranty gives you specific legal rights and you may have other rights which may vary from state to state or country to country For any warranty q...

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