Watts PWRO4ZRO Installation, Operation And Maintenance Manual page 6

STEP 5
Green Tube Connection
Step A – Locate green tube attached to the
RO Module . Insert the open end of
the green ⁄ " tube into the open
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quick-connect fitting on the Adapt-
A-Valve™ making sure the tube is
pushed in all the way to the tube
stop .
Step B – Connect the green tube from the RO
module to the Adapt-A-Valve™ that
is connected to the cold water angle
stop valve . Leave enough tube so it is
not kinked and cut the tube to the desired length .
STEP 6
Black Tube Connection
Step A – Locate black tube attached to the
RO Module . Insert the open end of
the black ⁄ " tube into the open
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quick-connect fitting on the Adapt-
A-Valve™ making sure the tube is
pushed in all the way to the tube
stop .
Step B – Connect the black tube from the RO
module to the Adapt-A-Valve™ that
is connected to the hot water angle
stop valve . Leave enough tube so it is
not kinked and cut the tube to the desired length .
STEP 7
Check Air Pressure in the Tank
Check air pressure when tank is empty of water!
Check air pressure in the storage tank when you notice a de-
crease in available water from the RO system. Air can be added
with a bicycle pump using the schrader valve that is located on
the lower side of the tank behind the blue plastic cap.
Step A – Turn off the incoming water
supply to the RO by turning the
knob on the Adapt-A-Valve™
clockwise until it stops . (Follow
the green tube away from the
RO system to find the Adapt-A-
Valve™ .)
Step B – Open the RO Faucet and allow water to drain from the tank
until it is completely empty .
When water from the RO faucet slows to a trickle, with the
faucet still in the open position, you may add air to the tank
to purge any left over water. This will ensure that the tank is
completely empty.
Step C – Once all water in the tank is purged, check air pressure
using an air pressure gauge, it should read between
5 – 7psi . (Digital air pressure gauge is recommended)
Step D – Follow startup procedure on Page 7 .
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STEP 8
Tank Ball Valve Installation
Step A – Wrap (7 to 12 turns) of Teflon
tape clockwise around the
male pipe threads (MPT) on the
Stainless Steel fitting on top of
the tank .
Do not let the tape cover the opening.
Step B – Thread the plastic elbow
ball-valve (supplied in the parts
bag) onto the stainless steel
connection on the top of tank .
Tighten using an adjustable
wrench . Do not over tighten as
plastic could crack .
Teflon is a registered trademark of E .I . Dupont de Nemours & Company .
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STEP 9
Blue Tube Connection (to RO tank)
Step A– Position the RO storage tank in a desired location . You may
stand it upright or lay it on its side (using the black plastic
stand included) .
Step B– Locate the ⁄ " blue tube in the parts bag . Connect one end
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of the tube to the tee fitting attached to the inline polishing
filter, clipped on to the RO membrane housing . Insert the
tube into the open tee fitting and use a
the white plastic nut securely .
Step C– Measure the tube from the inline polishing filter the tank
and cut it to length leaving a straight, square edge . To
connect the blue tube to the ball valve fitting, slip the blue
tube through the white compression nut, hand tighten the
white nut and add 1/4 turn with a
Set the blue ball valve knob in-line with the blue tube, this is
the "open" position.
A connection to a refrigerator / ice maker may be tee'd into this
blue tube and should be spliced in between the final filter and
the RO faucet.
STEP 10
Blue Tube Connection (from faucet)
Step A– Locate the ⁄ " blue tube attached to the RO faucet .
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Connect the open end of the tube to the straight fitting
attached to the inline polishing filter clipped on to the RO
membrane housing . Insert the tube into the open fitting and
use a ⁄ " wrench to tighten the white plastic nut securely .
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⁄ " wrench to tighten
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⁄ " wrench .
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