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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.
WARNING
!
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 IN-
STALLATION AND MAINTENANCE INSTRUCTIONS COULD
RESULT IN PRODUCT FAILURE WHICH CAN CAUSE PROP-
ERTY DAMAGE, PERSONAL INJURY AND/OR DEATH. Watts
is not responsible for damages resulting from improper instal-
lation and/or maintenance. Local building or plumbing codes
may require modifications 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.
NOTICE
Watts is not responsible for the failure of alerts due to connectivity
or power issues.
Save manual for future reference.
Refer to the enclosed for operating parameters to ensure proper
use with your water supply.
• 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 while in operation.
• 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 allow the system to freeze or expose the system to
freezing temperatures. Water freezing in the system can cause
equipment damage.
• Do not install in direct sunlight. Ultraviolet rays from the sun
may cause damage.
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
OneFlow Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
System Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Using OneFlow with Other Equipment . . . . . . . . . . . . . . . . . . . . . . . . . .4
Equipment Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Feed Water Chemistry Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 7
Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Notes to the Installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Installation and Start Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Bypass Valve Modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Installation Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11
Replacing the Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Replacement Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Note to the Home Owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
NOTICE
Refer to quick start guide included with the
Model U-M311 Smart Elapsed Time Monitor
for information on set up and registration. Full
manual is available in QR Code.
Introduction
The Watts residential OneFlow system provides protection from
hardness related scale formation on internal plumbing surfaces
throughout the plumbing system. This smart and connected
whole home solution monitors its own service schedule as well
as water usage. Automatic alerts are sent to the user by email or
text notifying when media replacement is necessary. 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 contact your Watts representative.
OneFlow reduces or eliminates scale formation on internal
plumbing surfaces.
OneFlow prevents scale by transforming the normal dissolved hard-
ness minerals into harmless, inactive microscopic crystal 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 plumbing fixtures is greatly reduced.
OneFlow is not a water softener or a chemical additive (like
anti-scalants or sequestrants). It is a scale prevention device
with years of successful residential and commercial installations.
OneFlow is the one water treatment device that effectively provides
scale protection and is a great salt-free alternative to water
softening (ion exchange) or scale seques tering chemicals.
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