Installation, Operation and
Maintenance Manual
Residential OneFlow
®
Anti-Scale System
Chemical-Free, Salt-Free Scale Prevention
Model OFRES-0835
Model OFRES-0935
Model OFRES-1035
Introduction
The Watts residential OneFlow
®
system provides protec-
tion from hardness related scale formation throughout the
plumbing system. The OneFlow
®
system can be installed at
the point of entry to treat your entire home. These systems
are designed to treat the domestic water used in a single
family dwelling. For higher volume applications please con-
tact your Watts representative.
OneFlow
®
reduces or eliminates scale formation on internal
plumbing surfaces.
OneFlow
®
prevents scale by transforming the normal dis-
solved hardness minerals into undissolved crystal micro-
particles. These crystals stay suspended in the water and
have a reduced ability to react and attach to surfaces like
dissolved hardness minerals do. Therefore, the problem of
internal buildup of scale in pipes, water heaters and plumb-
ing fixtures is greatly reduced.
Unlike softened water, OneFlow
®
treated water maintains the
beneficial essential mineral content of your water.
• Use only lead-free solder and flux for sweat-solder connections,
as required by state, province and federal codes.
• Handle all components of the system with care. Do not drop,
drag or turn components upside down.
• Be sure the floor under the system is clean, level and strong
enough to support the unit.
• Install the system in a protected area.
• Do not attempt to treat water over 100°F (38°C) with the system.
• Always connect the system to the main water supply pipe before
the water heater.
• Do not expose the system to freezing temperatures. Water freez-
ing in the system causes equipment damage.
• Do not install in direct sunlight. Ultraviolet rays from the sun may
cause damage.
IOM-OFRES
OFRES
If you are unsure about installing your Watts OneFlow
®
system
contact a Watts representative or consult a professional plumber.
You are required to thoroughly read all installation instructions and
product safety information before beginning the installation of this
product.
FAILURE TO COMPLY WITH PROPER INSTALLA-
TION AND MAINTENANCE INSTRUCITONS COULD RESULT
IN PRODUCT FAILURE WHICH CAN CAUSE PROPERTY
DAMAGE, PERSONAL INJURY AND/OR DEATH.
Watts is not
responsible for damages resulting from improper installation and/or
maintenance. Local building or plumbing codes may require modi-
fications to the information provided. You are required to consult
the local building and plumbing codes prior to installation. If this
information is not consistent with local building or plumbing codes,
the local codes should be followed.
Save manual for future reference.
Refer to the enclosed for operating parameters to ensure proper
use with your water supply.
Table of Contents
Pages
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Instructions Before Using. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
OneFlow
®
Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Equipment Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Using OneFlow
®
with Other Equipment . . . . . . . . . . . . . . . . . . . . 3
Important Note- Iron, Manganese, Copper . . . . . . . . . . . . . . . . . 4
Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Notes to the Installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation and Start Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Bypass Valve Modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Note to the Home Owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
WARNING
!
WARNING
!
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information
can result in death, serious personal injury, property
damage, or damage to the equipment.
Keep this Manual for future reference.
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