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Standard 2.5 gallon tank - 1/2 teaspoon (3 ml)

Alternate size tanks -1/2 teaspoon (3 ml) per 2.5

gallons of tank capacity.

E)

Turn on the feed water valve to force water and   

sanitizer into the tank.  Allow about three minutes   
of fill time for a standard 2.5 gallon tank.  (It 
should feel heavy.)

F)

The sanitizer should remain in the tank a mini-

mum   

of 15 minutes.  Turn off feed valve and tank valve.  
Disconnect the sanitizing device, reinstall the stor-
age tank, and reconnect feed tubing.

G)

Turn on feed valve to pressurize system.  Turn on  

tank valve and open faucet to drain tank of sanitizing   
solution. When tank is empty, the faucet should   
steadily drip.

H)

Close faucet and allow tank to fill for at least six   

hours. Drain tank again and discard water.  The   
appliance should be ready to use as soon as the 
tank refills. If any objectionable taste is noticed, 
drain tank again and allow to refill.

How To Sanitize The Purification Assembly

Sanitizing the purification assembly generally
requires:

• New prefilter cartridge(s) and filter housing O-ring(s)
• Water Factory filter wrench or equivalent
• Common household bleach (5.25% - NON scent-

ed)

• Measuring spoon or 0-10 ml graduated cylinder
• Removal of the purification assembly from its    

location

• Cloth or sponge to wipe up any spillage

A)

Shut off feed water and open RO faucet to empty   

tank

B)

Follow instructions on changing prefilter

C)

Before attaching filter bowl(s) with new cartridge(s),   
pour one teaspoon (5 ml) of household bleach into   
the center of the filter cartridge(s).

NOTE: 

For 4500 and 5000 Series appliances, it is

important that the bleach be poured directly down
the center of the carbon prefilter cartridge to fill the
small receptacle at the bottom of the bowl.  When
attaching the bowl, always keep upright to prevent
spilling the bleach.

A)

Allow system to run for at least six hours.  Drain   
tank and discard water.  The appliance should be  
ready to use as soon as the tank refills.  If any 
objectionable taste is noticed, drain tank again 
and allow to refill.

15

Summary of Contents for N4000 Series

Page 1: ...allation Operation and Maintenance Manual WATER FACTORY SYSTEMS N4000 N4500 N5000 Reverse Osmosis RO Drinking Water Appliance CUNO Incorporated 400 Research Parkway Meriden CT 06450 Tele 203 237 5541...

Page 2: ...nside Make sure to flush it thoroughly as directed before first use Table Of Contents Installation Instructions A Determine the appliance location B Prepare the area for installation C Prepare the app...

Page 3: ...and remove compo nents Check that all installation parts are present which includes the purification assembly storage tank faucet installation hardware and tubing Check that the air supply in the empt...

Page 4: ...the condition of the drain piping espe cially in older homes where the traps and tail pieces can be deceptively thin and frail If in poor condition it is wise to inform the customer that the conditio...

Page 5: ...air gap module Plumber s putty It is important to understand what is involved in this procedure First the glassy layer of porcelain must be penetrated through to the base metal Second a center disc o...

Page 6: ...usually mounted to the right or left sink cabinet sidewall taking into consideration the space available and the tank loca tion Generally the tank is placed in the rear of the sink cabinet while the...

Page 7: ...faucet until a steady stream of water flows Close faucet wait at least 5 minutes and carefully check for leaks Correct as necessary NOTE When the system is first turned on water may intermittently sp...

Page 8: ...er and hex nut onto the threaded nipple Hand tighten hex nut until faucet feels snug E After rechecking faucet orientation tighten hex nut 9 16 wrench or deep socket until faucet feels secure NOTE Fla...

Page 9: ...ion and slide faucet handle forward over spout hole to gain access to faucet valve Unscrew the tee bar and slotted bushing to remove valve Clean out obstruction or replace with new valve mechanism as...

Page 10: ...pipe farther from Properly plug original hole Caution Make sure drain saddle is always installed above before the the trap Fig 4 10 General Basement Installation Schematic Fig 2 Faucet with Air Gap 1...

Page 11: ...n Saddle Elbow Drain Saddle Mount drain saddle at either location Hole should be located on top of the pipe NOTE Some state and local plumbing codes may prohibit the use of saddle type valves and or d...

Page 12: ...tubing selected for use with these connectors be of high quality exact size and roundness and with no surface nicks or scratches If it is necessary to cut the tubing use a plastic tubing cutter or sh...

Page 13: ...only yearly replacement C Recommended maximum sediment prefilter service life is one year When To Replace Carbon Prefilter 4500 and 5000 Series Only The carbon prefilter removes free chlorine from th...

Page 14: ...low sanitizing and start up procedures for the storage tank and purification assembly outlined in Section IV IV RO Appliance Sanitization To assure the highest quality water from your Water Factor RO...

Page 15: ...he Purification Assembly Sanitizing the purification assembly generally requires New prefilter cartridge s and filter housing O ring s Water Factory filter wrench or equivalent Common household bleach...

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