Watts OFTWH - Manual

For Commercial, Residential and Food Service Applications
ES-OFTWH
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Job Location ––––––––––––––––––––––––––––––––––––––––– Approval ––––––––––––––––––––––––––––––––––––––––––––––
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Connection Sizes: 3 ⁄
4
" (20mm)
Flow Rates: From 0.5 gpm to 10 gpm (1.9 lpm to 38 lpm)
The OneFlow
® Anti-Scale System provides protection from
scale formation on internal and external plumbing surfaces.
The OneFlow ® system is a single cartridge-based system
that must be installed on a cold water line prior to a water-
heating device (water heater or tankless water heater) for
single tankless heaters.
OneFlow
® prevents scale by transforming dissolved hardness
minerals into harmless, 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 no longer a concern.
OneFlow
® is not a water softener. It does not add chemicals.
It is a scale prevention device with proven third party labora-
tory test data and years of successful commercial, residential
and food service applications. OneFlow ® is the intelligent
scale solution and is a great alternative to water softening (ion
exchange) or scale sequestering devices.
Features
• Chemical-free scale prevention and protection - converts hard-
ness minerals to harmless, inactive microscopic crystals mak-
ing OneFlow ® an effective alternative technology to a water
softener for the prevention of scale due to water hardness
• Virtually maintenance free - No salt bags or other chemicals
to constantly add or maintain
• No control valve, no electricity and no wastewater
• Uses environmentally friendly “green” technology
• Improves efficiency of all water heating devices and
downsream plumbing components.
• Simple sizing & installation – standard 3 /
4
" connections
• Perfect system for restaurants, cafeterias, coffee shops
and homes where multiple or single 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 once every two years
• Easily installed mounting bracket included w/filter wrench
to allow cartridge change-outs when necessary
Model OFTWH
OneFlow
®
Anti-Scale System
Models
Model Peak Flow Rate Connection Size
OFTWH 10 gpm (38 lpm) 3 ⁄
4
" (20mm) FNPT
Replacement Cartridge
OFTWHRM Cartridge should be replaced every 2 YEARS.
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 the equipment it is designed to protect.
The system will be sized for maximum or peak flow rate based
on the specification of said equipment. A OneFlow ® system
may also be installed to protect multiple pieces of equipment
from the ill-effects of hard water scale provided the aggregate
peak flow rate for each piece of equipment it is protecting has
been considered. 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. The installation area should be suitable in
size for the housing to be serviced without encumbrance and
the system should be installed per the Installation, Operation &
Maintenance manual as provided with each system.
The OneFlow
® system must not require additional waste water
to backwash, flush, or regenerate once put into service. The
system shall not require any chemical additives and shall not
require electricity for operation.
Note: Copper lines need to be passivized for a minimum
of 4 weeks before placing unit into service. Not for use on
closed loop systems.
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.
OFTWH
* The wetted surface of this product contacted by consumable
water contains less than one quarter of one percent (0.25%) of
lead by weight.
For hot water applications where water temperature is
110°F - 150°F (43°C - 66°C), please consult ES-OneFlow-Hot Water.