Green tube connection, Black tube connection, Final filter installation – Watts PWRO4ZRO User Manual

Page 6: Check air pressure in the tank, Tank ball valve installation, Step 5, Step 6, Step 9, Step 7, Step 8

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

⁄

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

⁄

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 9

Final Filter Installation

Step A – Locate

" blue tubing in parts bag . The final polishing filter

is clipped onto the top of the membrane housing . Connect

one open end of

" blue tubing to the quick-connect fitting

labeled "Faucet" located on the final polishing filter . Make

sure that the tube is pushed in all the way to the tube stop .

Step B – Connect the other end of the

" blue tubing connected to

the in-line filter to the quick-connect fitting located on the

faucet shank .

Note: 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 7

Check Air Pressure in the Tank

Note: 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 .

Tip: 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 com-

pletely empty.
Step C – Once all water in the tank is purged, check air pressure us-

ing an air pressure gauge, it should read between 5 - 7psi .

(Digital air pressure gauge is recommended)

Step D – Follow startup procedure on Page 7 .

Step A – Teflon

tape must be applied

in a clockwise direction . Wrap

(4 to 8 turns) around the male

pipe threads (MPT) on the

stainless steel fitting on top of

the tank .

Step B – Thread the Quick-Connect

ball valve (supplied in the

parts bag) onto the stainless

steel connector on the tank .

Caution: Do not Teflon

tape the

plastic elbow threads as this may cause

leaks .

Tank Ball Valve Installation

STEP 8

Teflon

is a registered trademark of E .I . Dupont de Nemours & Company .