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INTRODUCTION:
This manual contains information on the installation, operation and maintenance of Watts WM-120-PT
unit. Watts WM-120-PT has been designed for use with a pressurized storage tank. Proper installation and
maintenance will prevent costly equipment downtime.
Before installing and operating Watts WM-120-PT Reverse Osmosis Unit read the instructions carefully
and keep this manual available for future reference. Further information is available by contacting your
local Watts Distributor or Watts Pure Water in Phoenix, Arizona-U.S.A. 888-774-7405
Figure 1:
Shut off valve
Inlet ball valve
Flush ball
valve
Flow Restrictor
Note: Ball valves shown in closed position.
WM-120 Polyethylene tubing is color coded for easy installation.
a)
¼” OD Green Polyethylene tubing to be connected to a cold water feed supply.
b)
¼” OD Black Polyethylene tubing is for flushing of pre-filters and requires no connection.
c)
3/8” OD Red Polyethylene tubing is for connecting to a drain.
d)
¼” OD Blue Polyethylene tubing to be connected to a pressurized storage tank.
Make sure all Ball Valves are in the closed position until Start Up.
Watts Water Systems
25”
Mounting Holes on Center
10.75”
25”
2” clearance for
filter changes
14.25”
5.375”
8.50”
a
b
c
d
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