3M 3MRO501 Installation And Operating Instructions Manual Download Page 7

G.   INSTALL THE FEED WATER CONNECTION AND TUBING 

1)  Open faucet and turn off cold water feed valve to relieve pressure. 

2)  Locate the cold water stem on the underside of the faucet fixture. 

Unscrew the cold water feed tube from the faucet stem. Locate the 

Faucet Adapter that came with your drinking water system. Insert 

the black gasket into the threaded adapter and tighten onto the 

Faucet Cold Water Stem under the sink, making sure that 1/4” side 

connection is accessible and not facing the wall. Make sure not to 

overtighten.

3)  Take the Cold Water Feed Tube and attach to the Faucet Adapter, 

making sure not to over tighten.

4)  Locate the 1/4” Orange Tubing and insert into the 1/4” outlet of 

Faucet Adapter.  See Figure 3 and “Using Push-in Fittings” below.

5)  Leave cold water supply off. 

H.   PREFILL AND SANITIZE THE STORAGE TANK

 

Prefilling the storage tank is always recommended so that there is 

pressure to check for leaks as well as sufficient water to flush the carbon 

block post-filter. It is important to use a sanitizer when prefilling the tank 

so the solution can sanitize the tubing, fittings, and the faucet at start up.

1) 

Remove protective cover from storage tank and discard.  Pour a half 

teaspoon of common unscented household bleach (5.25%) into the 

end of the tank. Apply PTFE tape (not included) to threaded tank 

connection and install tank valve onto connection. 

Do not over 

tighten. 

Open the tank valve so that the tank valve handle is parallel 

to the valve body. 

2)

  Connect one end of the 3/8” yellow tubing into quick connect 

tank valve. Connect the other end of the 3/8” yellow tubing to the 

included 3/8” x 1/4” union connector.

3)

  Connect the free end of the 1/4” orange feedwater tubing to the other 

end of the 3/8” x 1/4” union connector.

4)

  Open the cold water feed valve (making sure the tank valve is still 

open) and allow the tank to fill (about 3 minutes).

5)

  Close the cold water feed valve 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” section.

NOTE: 

 If you 

encounter difficulty in 

removing the tubing 

from the 3/8” x 1/4” 

union connector, 

make sure the tank 

valve is closed and 

cut the yellow tubing 

approximately 1” 

away from the 

tank valve fitting to 

relieve the pressure.  

Remove the 1” piece 

from the tank fitting.

IMPORTANT: 

 After 

the installation 

is complete, it is 

recommended that 

the 3/8” x 1/4” union 

connector be saved 

for future use in tank 

sanitization.

I. INSTALL 

THE DRAIN 

CONNECTION

IMPORTANT: 

 

Before starting this 

procedure, inspect the 

condition of the drain piping, especially in older homes where the traps 

and tailpieces can be deceptively thin and frail.  If they are in poor 

condition, replace prior to installing the drain connection.

IMPORTANT:  Some local plumbing codes may prohibit the use of 

saddle-type drain connections.  

Undercounter Installation:

 

The drain saddle assembly is designed to fit around a standard 

1-1/2” OD drain pipe.  For smaller (lavatory type) or larger (ABS pipe) 

drains, consult your professional installer for special drain saddles.

MOUNT

HERE

NEVER

MOUNT

HERE

GARBAGE

DISPOSAL

Fig. 4

7

Vertical Position

Horizontal Position

Nut

Screw

Drain Saddle

Elbow

IMPORTANT:

Hole should be located on

top of the pipe if drain saddle

is positioned horizontally.

Drain Saddle

Halves

Fig. 5

Fig. 3

1/4” Orange 

Tubing

Faucet Stem

Undersink

Faucet Adapter

Cold Water

Feed Tube

Collet

Backstop

“Using Push-In Fittings”

CAUTION

To Attach Tubing

Push tubing in as far as 

it will go. Tubing must 

be inserted past o-ring 

and hit backstop. Pull 

tube to ensure it is 

secured.

To Release Tubing

Push in grey collet to 

release tubing. With 

collet held, pull tubing 

straight out. 

To reduce the risk associated with property damage due to 

water leakage:

 

• 

Ensure all tubing and fi ttings are secure and free of leaks.

Correct

Incorrect

Cut Tubing Straight

Summary of Contents for 3MRO501

Page 1: ... against NSF ANSI Standard 42 53 and 58 for the reduction of claims specified on the Performance Data Sheet Optimized For Reduction Of Nitrates Select Volatile Organic Compounds VOCs 1 Compared to the 3MRO401 reverse osmosis system which produces up to 18 95 gpd See Performance Data Sheet for additional details APPLICATION Superior Reverse Osmosis Drinking Water1 Drinking and hydration Hot and col...

Page 2: ...s 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 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 t...

Page 3: ...ystem 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 plumbing professional if you are uncertain how select install maintain a pressure relief valve Do not use a torch or other high temperature sources near filter system cartridges plastic fittings or plastic p...

Page 4: ...faucet mounting 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 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 ...

Page 5: ...fore 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 cabinet construction If drilling a hole in your sink is required the professional installer should follow the instructions below D MAKE THE FAUCET MOUNTING HOLE Drilling 7 8 diameter hole through countertop or stainless steel sink 1...

Page 6: ...r 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 threaded base of faucet 3 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 4 From above the sink counter top feed t...

Page 7: ... valve 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 section NOTE If you encounter difficulty in removing the tubing from the 3 8 x 1 4 union connector make sure the tank valve is...

Page 8: ...k 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 for a neat and orderly tubing flow by using fas...

Page 9: ...le 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 ...

Page 10: ...ig 6 8 Open the cold water feed valve plug in the booster pump transformer and carefully check for leaks 9 Pro RO System Flush Instructions Sediment Granulated Carbon Replacement Filters Close tank Lift the faucet handle and flush at least two 2 gallons of water through system approximately 10 minutes Carbon Block Post Filter Open tank Lift the faucet handle and flush at least two 2 gallons of wat...

Page 11: ...on scented Eye dropper or plastic oral syringe 1 Close the cold water feed valve and open 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 5 25 See Fig 7 4 Reconnect the yellow tube to the tank ba...

Page 12: ...warranty period 3M 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 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 questions please call 855 3M WATER 855 36...

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