WATTS OFPSYS OneFlow+ Salt-Free Scale Prevention and Water Filtration System User Manual

June 6, 2024
WATTS

WATTS OFPSYS OneFlow+ Salt-Free Scale Prevention and Water Filtration

System

Introduction

The OneFlow®+ system is an economical and environmentally friendly physical water treatment technology that protects pipes, extends the life of appliances, and provides better tasting water through filtration. The OneFlow®+ system is a dual cartridge-based system with a radial flow 20 micron carbon block cartridge which reduces sediment, chlorine taste and odor, and an integrated OneFlow® scale prevention cartridge.

The OneFlow®+ system uses template assisted crystallization to attract dissolved hardness minerals and convert them into harmless, inactive microscopic crystal particles.

These crystals stay suspended in the water and have a greatly reduced ability to react and attach to surfaces like dissolved hardness does. They eventually find their way
to a drain. The system requires very little maintenance, no backwashing, no salt and no electricity.

The OneFlow®+ system is not a water softener. It does
not add chemicals to the water. It is a scale prevention device with proven third party laboratory test data and years of successful residential installations. The OneFlow®+ system is the intelligent scale solution and is a great salt-free alternative to water softening (ion exchange) or scale sequestering devices.

Setup

Unpack and check the system components for damage or missing parts.
Installation Considerations
Consider the following points when determining where to install the system:

  • Do not install the system where it would block access to the water heater, main water shutoff, water meter, or electrical panels.
  • Install the system in a place where water damage is least likely to occur if a leak develops

.Using OneFlow®+ System with Other Water Treatment Equipment
Due to the unique properties of OneFlow®+, there are some unique requirements for using OneFlow®+ in conjunction with filtration or other forms of water treatment.

  1. OneFlow®+ must be the last stage in the treatment chain. Do not install any filters after OneFlow®+ or before any devices for which scale prevention is required. POU filters, e.g. carbon, RO or Ultraviolet (UV) are exempt from this requirement.

  2. Do not apply any other antiscalants before or after
    OneFlow®+.

  3. The addition of soaps, chemicals, or cleaners, before or after OneFlow®+ treatment, may reverse its anti-scale treatment effects and/or create water with a heavy residue or spotting potential. Any adverse conditions caused by the addition of soaps, chemicals, or cleaners are the sole responsibility of the end-user.

  4. OneFlow®+ is not a water softener and does not soften the water – Water treatment chemistry (e.g. antiscalants, sequestrants, soaps, chemicals or cleaners etc…) will most likely have to be changed to be compatible with OneFlow®+ treated water. Laundry and ware-washing chemistry will likewise require adjustments.

OneFlow®+ System Benefits

  • Reduces sediment, chlorine taste and odor

  • Chemical-free scale prevention and protection – converts hardness minerals to harmless, inactive microscopic crystals making OneFlow®+ systems 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

  • Environmentally friendly technology adds no salt or chemicals to the water system

  • Improves efficiency of all water heating devices and downstream plumbing components

  • Simple installation – standard 1″ connections

  • Excellent system for homes where equipment protection
    is desired for longer equipment life and reduced energy consumption

  • OneFlow®+ cartridge-based systems are easily maintained

  • Easily installed mounting bracket and multi-function tool included to allow cartridge change-outs when necessary

Equipment Specifications

Watts OneFlow®+ systems are complete, self-contained, loaded with media and ready to use. A simple inlet and outlet connection is all that is required for installation. Please review operating pressures, temperatures and water chemistry limitations to ensure compatibility and performance.

Dimensions — Weights

The overall height and the height of the inlet fitting varies due to material variations and assembly tolerances. Please allow additional clearance above the system for making connections and replacing cartridge filters.

Feed Water Chemistry Requirements
pH 6.5-8.5
Hardness (maximum) 30 grains (513 ppm CaCO3)*
Water Pressure 10psi to 90psi (0.69 bar to 6.2 bar)
Temperature 40°F to 100°F (5°C to 38°C)
Free Chlorine <2 ppm
Iron (maximum) 0.3 ppm**
Manganese (maximum) 0.05 ppm**
Copper (maximum) 1.3 ppm***
Oil & H2S Must be Removed Prior to OneFlow
Total Phosphates <3.0 ppm
Silica (maximum) 20 ppm †
TDS

NOTICE

  • Systems using OneFlow® technology are effective at controlling lime-scale formation inside the plumbing system at influent hardness levels up to 30 grains per gallon (513 ppm) as calcium carbonate. Due to variances in water chemistry, 30 grains per gallon 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 where hardness levels exceed 30 grains per gallon.

** Just as with conventional water softening media, OneFlow® media needs to be protected from excess levels of certain metals that can easily coat the active surface, reducing its effectiveness over time. Public water supplies rarely, if ever, present a problem, but if the water supply is from a private well, confirm that the levels of iron (Fe) and manganese (Mn) are less than 0.3 ppm and 0.05 ppm, respectively.

WARNING

*** Pursuant to the EPA drinking water standards, the copper concentration permitted is up to 1.3 ppm. Typically originating from new copper plumbing, high levels of copper can foul OneFlow® media. New Copper lines need to be passivated for a minimum of 4 weeks before placing the unit into service. For applications with copper concentrations greater than 1.3 ppm, please consult Watts Water Quality Technical Service. To further minimize any problem with excess copper, avoid applying excessive flux on the inner surfaces of the pipe and use a low-corrosivity water-soluble flux listed under the ASTM B813 standard.

NOTICE

† OneFlow® media does not reduce silica scaling. While silica tends to have a less significant effect on scale formation than other minerals, it can act as a binder that makes water spots and scale residue outside the plumbing system difficult to remove. This 20 ppm limitation is for aesthetic purposes.
†† All other contaminants must meet the requirements of the USEPA Safe Drinking Water Act. Specific Mineral and Metal MCL’s, identified in Watts published Feed Water Chemistry Requirements, supersedes the USEPA SDWA.
Water known to have heavy loads of dirt and debris may require pre-filtration prior to OneFlow®.

Filter Cartridge Replacement Frequency

Filter Cartridge Replacement Frequency
Radial Flow Carbon Block Replace Annually
OneFlow® Scale Prevention Cartridge Replace Every 3 Years

NOTICE
The replacement frequency listed above is maximum life expectancies. Filter replacement may be required sooner based on water quality and application variables.

NOTICE

| | pH| 6.5-8.5
---|---
Hardness (maximum)| 30 grains (513 ppm CaCO3)*
Water Pressure| 10psi to 90psi (0.69 bar to 6.2 bar)
Temperature| 40°F to 100°F (5°C to 38°C)
Free Chlorine| <2 ppm
Iron (maximum)| 0.3 ppm
Manganese (maximum)| 0.05 ppm

Copper (maximum)| 1.3 ppm***
Oil & H2S| Must be Removed Prior to OneFlow
Total Phosphates| <3.0 ppm
Silica (maximum)| 20 ppm †
TDS| <1500 mg/L ††

Contaminant Treatment

Sediment / Particulates:20 microns with a dirt holding capacity up to 2.2 lbs (1 kg)

Chlorine Reduction:50,000 gallons (189,000 liters)† @ 3 gpm (11.34 lpm)

Scale Prevention: Up to 3 years † according to lab test of carbon block manufacturer

CAUTION

  • Do not let the system freeze. Damage to the housing may result.

  • System must be operated in a vertical position. Do not lay it down during operation. The system may be placed in any position for shipping and installation but must be operated in the vertical position.

  • Place the system on a smooth, level surface. Because the system operates in an UP-Flow, fluidized bed mode, having a level surface is more important than with a softener or media filter.

  • A bypass valve should be installed on every system to facilitate installation and service.

  • Observe all local plumbing and building codes when installing the system.

  • All new copper pipe and fittings used in the installation
    of this system should be allowed to self passivate, under normal operation and water flow, for a period of 4 weeks minimum before placing the unit into service.

  • If making a soldered copper installation, do all sweat soldering before connecting pipes to the system’s threaded inlet and outlet plastic plumbing adapters. Torch heat will damage plastic parts.

  • When turning threaded pipe fittings onto plastic fittings, use care not to cross-thread.

  • Use PTFE tape on all external pipe threads. Do not use pipe joint compound.

  • The complete weight of the plumbing system must be supported by pipe hangars or other means.

  • Do not use on water that is microbiologically unsafe or of unknown quality.

NOTICE
Notes to the Installer

The OneFlow®+ system differs from a conventional softener or media filter in a number of key respects

  • The system is light and only partially filled with media. This is normal. The UP-flow operation of the system requires a lot of freeboard to allow the bed to fully fluidize.
  • The system has no underbed so you can tip the system over without any fear of upsetting the media. This makes transportation and installation much easier than conventional systems. System must be installed in VERTICAL POSITION.
  • Please observe all Feed Water Chemistry Requirements and all related NOTICES and WARNINGS on page 3.
  • Please see the note about “Using OneFlow®+ System with Other Water Treatment Equipment” on page 2.
  • This system is designed for residential applications only.

Installation Instructions

The new system comes with the cartridges and outlet connector pre-installed. The installer should verify this prior to installation.
How to install your OneFlow®+ system can also be found at: http://thescalesolution.com/residential

NOTICE
Please remove all items from the carton. Confirm that all items are present and ready for assembly and installation.

  1. The system can stand upright in the desired location without the need to affix to a wall with a mounting bracket. However, a mounting bracket is included as a separate part (Item 1).

  2. Place the system in the desired location. Make sure that the location is level and sturdy enough to support the weight of the system when in operation.

  3. Turn off the main water supply to the home and open an inside faucet to relieve any pressure within the plumbing system.

  4. Apply plumbing tape to the threads of the 1″ NPT Threaded Adapters
    (Item 3) and insert them into the inlet and outlet of the OneFlow®+ Housing (Item 2) as shown in Diagram A.

  5. Secure these adapters with the two red adapter Locking Pins (Item 4) as shown in Diagram A.

  6. Connect the cold water supply to the inlet of the OneFlow®+ system.

  7. Install a supply valve (user supplied) in the supply line and close it.

  8. Place a bucket under the outlet port or run a line from the outlet port to a drain.

  9. Turn on the main water supply to the home. Slightly open the supply valve to the OneFlow®+ system to allow the housing to fill with water. Close the supply valve when a steady stream of water comes out of the outlet port. If the outlet is flowing into a bucket, water could splash on nearby objects. If this threatens the safety, value, structure, or appear-ance of these objects, protect/remove them or use the outlet hose to drain option.

  10. Close the inside faucet.

  11. Connect the outlet of the OneFlow®+ system to the cold water supply to the house.

  12. Install an outlet valve (user supplied) in this plumbing line and close it.

  13. Install and optional bypass valve between the inlet and outlet plumbing lines and close it.

  14. Open the inlet and outlet valves and both the hot and cold faucets downstream from the OneFlow®+ system to relieve any air from the plumbing system and water heaters. Then close the faucets.

  15. Check for leaks. Repair as needed.

Changing the Filter Cartridges:

  1. Turn off the inlet and outlet valves on the system’s supply and outlet lines.

  2. Use the Multifunction Tool (Item 6) to release air from the system. This is done by taking the tool and unscrewing the Pressure Relief Valve
    (Item 5) – refer Diagram F.

  3. Use Multifunction Tool (Item 6) to unscrew OneFlow®+ Head Assembly (Item 7) counterclockwise and remove from the OneFlow®+ Housing as shown in Diagram G.

  4. Remove Outlet Connector (Item 8) from top of OneFlow®+ Scale Reduction (TAC) Cartridge – refer Diagram D.

  5. Use Multifunction Tool (Item 6) to remove OneFlow®+ Scale reduction (TAC) cartridge (Item 10) from the Sediment/Carbon Cartridge (Item 9) as shown in Diagram H.

  6. Remove the Sediment/Carbon (Item 9) from the OneFlow®+ Housing by hand.

  7. Remove new Sediment/Carbon cartridge from packaging and place carefully inside the OneFlow®+ Housing as shown in Diagram B.

  8. Insert OneFlow®+ Scale Reduction (TAC) cartridge back into the center of the Sediment/Carbon cartridge making sure that it is sealed correctly as shown in Diagram C.

  9. Insert Outlet Connector (Item 8) into outlet port and secure back on top of the OneFlow®+ Scale Reduction cartridge as shown in Diagram D.

  10. Place Head Assembly back onto OneFlow®+ Housing and using the multifunction tool tighten by screwing the Head Assembly clockwise as shown in Diagram

  11. DO NOT OVERTIGHTEN
    . Close the pressure relief valve by tightening in a counterclockwise direction as shown in Diagram F.

  12. Turn on the inlet and outlet valves on the system’s supply and outlet lines and check for leaks.

  13. Open a downstream cold water faucet to flush any air from the plumbing system.

NOTICE

  1. Where influent water pressure will at any time exceed 500 kPa (70psi) a suitable pressure limiting valve must be installed.
  2. Product performance is dependent upon influent water quality.
  3. The system must be installed and maintained in accordance with the manufacturer’s instructions including replacement of the filter cartridges.
  4. Please ensure all O-rings are well lubricated and clean from foreign particles.

Note To The Home Owner

Your OneFlow®+ system will improve the properties of water throughout your home. Here are some things to expect and some recommendations for maximizing the benefits and your enjoyment of OneFlow+:

Sinks and fixtures – should have reduced spotting. If water is allowed to evaporate off a surface, small spots may be left behind. Many times this residue is easier to clean up than the previous hard water spotting.

Dishwasher-Spotting on dishes and on the surface of the dishwasher should be greatly reduced.
We recommend that you immediately reduce the amount of dishwashing detergent by approximately 50% as compared to hard water
use. Dishwashing detergents low in phosphates are highly recommended as they are better for the environment and phosphates can cause spotting. In very hard water areas, the use of rinse aid may be advised. Shower doors and tiles – should have reduced spotting. When water evaporates off a surface, small spots may be left behind. Depending on water chemistry, these spots may be easy to remove with a damp cloth or sponge.
.In the bath Soaps and shampoos will rinse off much easier and faster than they would with traditional soft water. We recommend the use of modern soaps for the best results.

Things to watch for:
During the first 30-90 days:

  • Faucet aerators and drains may plug occasionally as old scale is removed from your plumbing system and water heater.
  • You may also see milky water after installation of the system. This could be due to trapped air within the plumbing system or the descaling affect of OneFlow® and will eventually go away.

Good practices:
If your dishwasher is severely coated with scale at the time of installation, we recommend that you purchase a product like Jet-Dry® Dishwasher cleaner to accelerate the cleaning. After this initial cleaning OneFlow®+ should keep it clean.
We also recommend that you drain your water heater tank. This should be done 30 to 60 days after OneFlow®+ is installed, and again in one year. This is a good practice that can dramatically increase the life of your water heating appliance. The OneFlow®+ will help keep the tank and heating elements free of scale and operating at peak efficiency. Please follow the manufacturer’s instructions when draining the tank!

Ordering Information

ONEFLOW ® + COMPLETE SYSTEM

Ordering Code| Model Number| Description
7100638| OFPSYS| Scale Prevention and Water Filter System
ONEFLOW ® + WATER FILTER REPLACEMENT
7100639| OFPRFC| Radial Flow Carbon Block Cartridge
7100640| OFPSP| Scale Prevention Cartridge
7100641| OFPCOM| Scale Prevention and Carbon Block Combo Pack
ONEFLOW ® + SYSTEM REPLACEMENT PARTS
7300759| OFPHSG| Housing and Head Assembly
7300760| OFPAP| Inlet/Outet Red Adapter Locking Pin
7300761| OFPA| 1-In NPT Inlet/Outlet Adapter
7300762| OFPOC| Outlet Connector
7300763| OFPTOOL| Multifunction Tool
7300764| OFPMB| System Mounting Bracket

Limited Warranty

  • The OneFlow®+ cartridge system is warranted to be free of defects in materials and workmanship for 1 year from the date of original shipment.
  • The OneFlow®+ cartridge is warranted for performance for a period of 2 years from the date of the original installation when installed and operated in accordance with the instructions in the corresponding Installation and Operation Manual.
Conditions
  1. OneFlow®+ systems are warranted for domestic use in residential single family dwelling applications excluding irrigation water treatment. The use of these systems in light commercial, commercial, or industrial applications will void their limited warranty.

  2. The OneFlow®+ system must be installed in applications with municipally supplied water adhering to EPA guidelines.

  3. Any component failure must not result from abuse, fire, freezing or other acts of nature, violence, or improper installation.

  4.  Equipment must be installed and operated in compliance with the local plumbing codes and on an approved water supply.

  5. Equipment is limited to use at water pressures and temperatures that do not exceed our published specifications.

  6. Water supply must not exceed 2.0 PPM chlorine. For water supply exceeding 2.0 PPM chlorine, pretreatment is required.
    (Please contact your water treatment specialist.)

  7. Information, including model number, serial number, and date of installation, must be provided for any claims pertaining to equipment in warranty.

  8. Defective parts are subject to inspection by either Watts Regulator Company or any authorized representative before final commitment of warranty adjustment is made.

  9. Watts Regulator Company reserves the right to make changes or substitutions in parts or equipment with material of equal quality or value and of then-current production.

Limitations

Our obligation under this warranty with respect to the 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 replacement parts will be delivered to the owner F.O.B. nearest factory, at no cost, excluding freight and local labor charges, if any.
Our obligation under this warranty with respect to the OneFlow®+ media will be limited to furnishing a replacement for the media within two years from date of original installation. Such replacement media will be delivered to the owner F.O.B. nearest factory, at no cost, excluding freight and local labor charges, if any. Damage to the media due to chlorine, other oxidizers or fouling caused by local water conditions or any other operation outside of the limits shown under Specifications, is not covered by this warranty.

THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY WATTS REGULATOR COMPANY WITH RESPECT TO THE PRODUCT. WATTS REGULATOR COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. WATTS REGULATOR COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described under this warranty shall constitute the sole and exclusive remedy for breach of warranty, and Watts Regulator Company shall not be responsible for any incidental, special or consequential damages, including without limitation, freight, handling, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical,
or any other circumstances over which Watts Regulator Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication or improper installation of the product.
Some states do not allow limitations on how long an implied warranty lasts, and some states do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This warranty gives you specific legal rights, and you may have other rights that vary from state to state. You should consult applicable state laws to determine your rights.

SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE APPLICABLE WARRANTY PERIODS STATED ABOVE.

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