Watts ADWU-T User Manual
ADWU-S
ADWU-D-UV (with UV lamp)
ADWU-TM (with meter)
ADWU-DM (with meter)
Fully Assembled Under Counter Drinking Water Units
Features
• Systems are fully assembled for
easy installation.
• No name cartons for private labeling.
• NSF certified filter housings.
• Lead-free, long reach faucets.
• Automatic shut-off models available.
• Genuine John Guest fittings.
• Saddle valves and tubing included.
Note: ADWU-D-UV systems come with UV lamp, ballast, sediment cartridge
and carbon block cartridge. Other models, cartridges are additional. The
recommended maximum flow rate for the ADWU-D-UV system is one GPM.
Model Number Size UV Cartridges Auto.
Shut-Off
ADWU-S Single No Not incl. No
ADWU-D Dual No Not Incl. No
ADWU-DM Dual No Not Incl. Yes
ADWU-D-UV Dual Yes Included No
ADWU-T Triple No Not Incl. No
ADWU-TM Triple No Not incl. Yes
®
WATER QUALITY & CONDITIONING PRODUCTS
Your Drinking Water System has been tested to ensure
it will operate correctly. The following periodic
maintenance is recommended so your system will
provide years of trouble-free service:
Replacement cartridges Replacement
Pre-filter (sediment) Every 6 mos.
Post-filter (activated carbon) Every 6-12* mos.
*depending on usage.
System location: Your drinking water system may be
installed under a sink, in a basement or other location,
depending on available space. Do not install unit
where temperatures fall below freezing.
1. Turn off cold water valve from under sink or main
water line valve for whole house.
2. Before installing self-tapping feed water valve,
make sure piercing lance does not protrude
beyond the rubber gasket.
3. Assemble saddle valve on copper tubing.
4. Turn handle clockwise to pierce soft copper
tube until valve is firmly seated. (Valve is
closed in this position.)
5. Turn on water supply to pressurize the cold
water line.
6. Snug nut / seal with wrench around valve stem.
7. Connect tubing to feed water valve using brass
compression nut, insert and plastic sleeve.
Faucet should be placed near the sink. A 2” flat
surface is required to mount the faucet, and the
thickness of the mounting thickness should not exceed
1-1/4”. Size hole required is 7/8" (or 9/16").
Feed water connection is accomplished with a self-
piercing feed water saddle valve (provided). Locate
this assembly as close to the system as possible,
Connect to a potable, cold water supply line only.
Installation steps
Faucet installation: If the sprayer hole is not used and
a hold must be provided, check below sink to be sure
the drill does not interfere with anything below. Position
the faucet so it empties into the sink and the spout
swivels freely for convenience.
Feed the threaded nipple through sink or counter
mounting hole and orient the faucet. From below sink or
counter, assemble the white spacer flat washer and hex
nut on threaded nipple and tighten by hand. Tighten
with wrench secure until the faucet is secure.
Feed water valve and tubing installation
The self-tapping feed valve (supplied) is designed for
use with 3/8" to 1/2" OD soft copper supply tubing
(plain or chromed) and rigid metal pipe. Do not use
with flexible ribbed supply tubing, which is too thin and
requires special hardware.
Tightening
screw
Initial tubing connections: For convenience, it may
be advisable to complete under counter hose connections at this time.
Unit installation: To mount the drinking water unit,
elevate it at least 2" off the floor and mark the location
of mounting holes needed. Drill holes for mounting
screws and install screws, allowing the mounting
bracket slots to slip over them.
Final tubing connections: With all components in
place, complete final tubing connections using these
guidelines:
• Tubing should follow contour of the cabinets.
• Cut tubing to desired length using square cuts.
• Do not make sharp bends.
• Keep tubing from the unit to the faucet as short
as practical for good flow. Icemaker hookup
(optional): The drinking water device can be
connected to any standard ice maker. (Extra
fittings are required).
System start-up: Prior to start-up:
1.Check all connections so they are secure.
2.Turn valve handle counter clockwise to open the
feed water saddle valve and check for leaks.
3.Close faucet and wait to see if leaks result.
Limited warranty: Drinking water units are warranted for
materials and workmanship for one year from date of
shipment. Please see warranty card for more
information.
Valve handle
Self-taping
saddle valve
Brass
insert
Plastic ferrule
Compression
nut
Tubing to
RO inlet
Installation procedures using soft copper tubing:
Reversible
backplate
installation
for feed water
supply
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