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Introduction

The Watts

®

 OneFlow

®

 Anti-Scale System provides protection from 

scale formation on internal plumbing surfaces. The OneFlow

®

 sys-

tem can be installed at the point of entry to a building to treat both 

hot and cold water, or it can be located directly before a water 

heater, boiler, or other water using device that requires protection 

from hard water.
OneFlow

®

 prevents scale by transforming the normal dissolved 

hardness minerals into undissolved crystal microparticles. These 

crystals stay suspended in the water and have a greatly reduced 

ability to react and attach to surfaces like dissolved hardness 

does. Therefore the problem of internal buildup of scale in pipes, 

water heaters and on fixtures and glass 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 proven 

third party laboratory test data and 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 sequestering 

chemicals. Laundry and warewashing chemistry will likewise require 

adjustments.

OneFlow

®

 Benefits

•   Chemical-free scale prevention and protection – converts 

hardness minerals to harmless, inactive microscopic crystals 

making OneFlow

®

 an effective alternative technology to  

a water softener for the prevention of scale due to water 

hardness

•  Virtually maintenance free - no control valve
•   Uses environmentally friendly technology by using no salt  

or other chemicals to constantly add, no electricity and  

no wastewater

•   Improves efficiency of all water using appliances – both hot** 

and cold

•   Simple sizing & installation – all you need to know is pipe 

size and the peak flow rate

•   Safe for landscaping and lawn watering, no need for costly 

bypass plumbing

•   Compatible with all on-site and community wastewater  

treatment systems

•   Perfect system for towns or communities where water  

softeners are banned or restricted

Installation, Operation and Maintenance Manual

Model OF1354-30TM, OF1465-50TM and  

OF1665-75TM OneFlow

®

 Anti-Scale Systems 

Chemical-Free, Salt-Free Scale Prevention

IOM-OF1354TM_OF1465TM_OF1665TM

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.

Do not use with water that is microbiologically unsafe or of 

unknown quality without adequate disinfection before or after  

the system.

WARNING

!

You are required to consult the local building and plumbing codes 

prior to installation. If the information in this manual is not consis-

tent with local building or plumbing codes, the local codes should 

be followed. Inquire with governing authorities for additional  

local requirements.

WARNING

!

•   For high-flow applications, install multiple tanks in parallel
•   OneFlow

®

 does not remove minerals or add sodium to the 

water supply

•   OneFlow can be installed as pre-treatment to commercial 

reverse osmosis systems (contact your Watts Representative 

for further details)

**  For hot water applications where feed water temperature is 

100°F – 140°F (38° – 60°C), please consult ES-OneFlow-

HotWater.

The wetted surface of this product contacted by consumable 

water contains less than 0.25% of lead by weight.

Systems are tested and certified by WQA  

against NSF/ANSI/CAN Standard 61 and  

NSF/ANSI 372 for Lead Free compliance.

Tank base may vary from image shown

Summary of Contents for OneFlow OF1354-30TM

Page 1: ...of all water using appliances both hot and cold Simple sizing installation all you need to know is pipe size and the peak flow rate Safe for landscaping and lawn watering no need for costly bypass pl...

Page 2: ...aundry and ware washing chemistry will likewise require adjustments WARNING Specifications A OneFlow scale prevention system shall be installed on the main water service pipe just after it enters the...

Page 3: ...is a recommended hardness maximum due to potential aesthetic issues related to soft scale residue formation outside of the plumbing system Testing should be performed to determine proper application w...

Page 4: ...ggested Watts 2 Flexible Connec tors is C515285 Two are included and required for installation Models OF1354 30TM OF1465 50TM and OF1665 75TM Anytime OneFlow systems are installed above the ground flo...

Page 5: ...rden hose and continue to siphon until the tank is about half full with water 12 Using the step ladder again reinstall the distributer tube with bottom strainer that was removed in step 6 Center the d...

Page 6: ...SSEMBLY 2 1 68100863 FLEX HOSE 2 X 12 OF1465 OF1665 MODELS ONLY 3 1 7300784 DISTRIBUTOR TUBE BOTTOM DISTRIBUTOR ASSEMBLY 4a 1 68100754 13 x 54 TANK 4 TOP OF1354 MODEL ONLY 4b 1 68100998 14 X 65 TANK 4...

Page 7: ...he tank or valve is limited to furnishing a replacement for or at our option repairing any part or parts to our satisfaction that prove defective within the warranty period stated above Such replaceme...

Page 8: ...IOM OF1354TM_OF1465TM_OF1665TM 2350 68109072 2023 Watts USA T 800 224 1299 Watts com Canada T 905 332 4090 Watts ca Latin America T 52 55 4122 0138 Watts com...

Page 9: ...ora la eficiencia de todos los aparatos que utilizan agua fr a o caliente Tama o e instalaci n simples lo nico que necesita saber es el tama o de las tuber as y el caudal de flujo m ximo Es seguro par...

Page 10: ...CIA Especificaciones El sistema de prevenci n de sarro OneFlow debe instalarse en la tuber a de servicio de agua principal justo despu s de que ingresa en el edificio pero despu s de otros dispositivo...

Page 11: ...os por fuera del sistema de plomer a Se deben realizar pruebas para determinar la aplicaci n adecuada en la que los niveles de dureza exceden los 30 granos por gal n Al igual que con los medios suaviz...

Page 12: ...as con el soporte apropiado Instale las tuber as Conecte las tuber as de entrada y salida seg n sus preferencias y cualquier reglamento local aplicable Incluya puertos de muestreo drenaje con conexio...

Page 13: ...sta que el tanque est lleno hasta la mitad de agua 12 Utilizando nuevamente la escalera reinstale el tubo de distribuci n con tamiz inferior que se quit en el paso n 6 Centre el tubo distribuidor en l...

Page 14: ...OF1465 Y OF1665 3 1 7300784 CONJUNTO DE TUBO DISTRIBUIDOR Y DISTRIBUIDOR INFERIOR 4a 1 68100754 TANQUE DE 13 IN X 54 IN 33 0 CM X 137 2 CM PARTE SUPERIOR DE 4 10 CM SOLO MODELO OF1354 4b 1 68100998 T...

Page 15: ...nt a con respecto al tanque o la v lvula est limitada al reemplazo o la reparaci n a nuestra elecci n de cualquier pieza o piezas a nuestra satisfacci n con defectos comprobados dentro del per odo de...

Page 16: ...IOM OF1354TM_OF1465TM_OF1665TM 2350 68109072 2023 Watts EE UU T 800 224 1299 Watts com Canad T 905 332 4090 Watts ca Am rica Latina T 52 55 4122 0138 Watts com...

Page 17: ...u us e Am liore l efficacit de tous les appareils utilisant de l eau eau chaude et eau froide Dimensionnement et installation simples tout ce que vous devez savoir est la taille du tuyau et le d bit d...

Page 18: ...ive et pour le lavage de vaisselle n cessiteront galement des ajustements AVERTISSEMENT Caract ristiques techniques Un syst me de pr vention du tartre OneFlow sur le principal tuyau de branchement d e...

Page 19: ...de probl mes esth tiques potentiels li s la formation de r sidus faible chelle l ext rieur du syst me de plomberie Des essais doivent tre effectu s afin de d terminer l application appropri e lorsque...

Page 20: ...recommand est C515285 deux sont inclus et requis pour l installation Mod les OF1354 30TM OF1465 50TM et OF1665 75TM Lorsque les syst mes OneFlow sont install s au rez de chauss e d un b timent il est...

Page 21: ...e tuyau d arrosage et continuez siphonner jusqu ce que le r servoir soit moiti plein d eau 12 En utilisant nouveau l chelle r installez le tube de distributeur avec filtre en bas qui a t retir l tape...

Page 22: ...1 7300784 TUBE DE DISTRIBUTEUR ET ASSEMBLAGE DE DISTRIBUTEUR INF RIEUR 4a 1 68100754 PARTIE SUP RIEURE 4 po 101 6 mm R SERVOIR 13 X 54 po 330 2 X 1371 6 mm MOD LE OF1354 SEULEMENT 4b 1 68100998 PARTIE...

Page 23: ...Limitations Notre obligation en vertu de la pr sente garantie par rapport au r servoir ou la vanne est limit e fournir un remplacement pour ou selon notre option la r paration de l ensemble des pi ces...

Page 24: ...IOM OF1354TM_OF1465TM_OF1665TM 2350 68109072 2023 Watts U T l phone 800 224 1299 Watts com Canada T l phone 905 332 4090 Watts ca Am rique latine T l phone 52 55 4122 0138 Watts com...

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