Instructions / Assembly

For Single Residential Tankless Water Heater Unit
ES-OFTWH-C
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Inlet/Outlet Connections:
3
⁄4" FNPT (19.05 mm)
Nominal Flow Rate up to 5 gpm (18.92 lpm)
The OneFlow
®
Anti-Scale System provides protection from
scale formation on internal plumbing surfaces. The OneFlow
®
system is a single cartridge-based system that must be
installed on a cold water line prior to a single residential water
heating device (water heater or tankless water heater).
The OneFlow
®
system uses template assisted crystallization
TAC to attract hardness minerals and convert them into harm-
less, inactive microscopic crystal particles.
These crystals stay suspended in the water and are passed
to drain. The system requires very little maintenance, no back-
washing, no salt and no electricity. Typical hardness problems,
especially build-up of scale in heating elements, pipes, water
heaters, boilers and on fixtures, are reduced.**
The OneFlow
®
system is not a water softener. It does not add
chemicals. It is a scale prevention device with proven third party
laboratory test data and years of successful commercial, resi-
dential and foodservice applications. The OneFlow
®
system is
the intelligent scale solution and is a great salt-free alternative to
water softening (ion exchange) or scale sequestering devices.
Features
• Chemical-free scale prevention and protection - converts
hardness minerals to harmless, inactive microscopic crys-
tals making OneFlow
®
an effective salt-free alternative to ion
exchange water softeners
• Virtually maintenance free - no salt bags or other chemicals to
constantly add or maintain
• No control valve, no electricity and no wastewater
• Improves efficiency of all water heating devices and
downstream plumbing components
• Simple sizing & installation – standard
3
/4" connections
• Excellent system for homes where equipment protection
is desired for longer equipment life and reduced energy
consumption
• Inlet ball valve for easy isolation shutoff and filter changes
• OneFlow
®
cartridge-based systems are easily maintained;
change the cartridge at least once every two years
• Easily installed mounting bracket included w/filter wrench
to allow cartridge change-outs when necessary
Model OFTWH-C
OneFlow
®
Anti-Scale System
Specifications
A OneFlow
®
scale prevention system shall be installed on the
cold water service line to condition the tap water just prior
to the service line feeding a single residential Tankless Water
Heater unit it is designed to protect. The system will be sized
for maximum or peak flow rate based on the specification of
said equipment. The system shall be plumbed with a bypass
valve to allow isolation of filter housing to allow the bypass of
untreated water in the event that service or cartridge replace-
ment be necessary. Bypass is recommended but not required.
The installation area should be suitable in size for the housing to
be serviced without encumbrance.
The OneFlow
®
system must not require additional wastewater
to backwash, flush, or regenerate once put into service. The
system shall not require any chemical additives and shall not
require electricity for operation.
OFTWH-C
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
NOTICE
For hot water applications where untreated feed water temperature
is 100°F - 140°F (38°C - 60°C), please consult ES-OneFlow-HotWater.
LEAD FREE
*
The information contained herein is not intended to replace the
full product installation and safety information available or the
experience of a trained product installer. You are required to thor-
oughly read all installation instructions and product safety infor-
mation before beginning the installation of this product.
NOTICE
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.