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Watts OFPSYS OneFlow Plus Whole House Water Filter System & Water Softener, System + Carbon Water Filter + Scale Reduction Cartridge, 3 Piece Set

4.3 4.3 out of 5 stars 215 ratings

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Water Filter

Purchase options and add-ons

Material
Plastic
Capacity
2.2 Pounds
Included Components
Scale Prevention and Water System
Purification Method
Carbon Block

About this item

  • Chemical-free scale reduction and protection converts hard minerals into soft particles preventing build up inside pipes and does not add or remove anything from water, allowing useful minerals such as calcium, potassium, and magnesium to remain
  • High-capacity, 20-micron water filter removes chlorine taste and odor while reducing sediment without chemicals or salt which is better for the environment leaving nothing but quality drinking water
  • Virtually maintenance free, no electricity, wastewater, control valve and includes 1 carbon block good for up to 50,000 gallons, 1 scale reduction cartridge good for up to 250,000 gallons or 3 years, and multi-function tool for cartridge change-outs
  • Improves efficiency of all water heating devices and downstream plumbing components, improves equipment life, reduces energy consumption and is a great alternative to standard water softener or other whole house water filter systems
  • Easily installed to the floor or wall using included mounting bracket; connect the system to the main water supply pipe before the water heater and do not expose the system to freezing temperatures

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Product details

  • Product Dimensions ‏ : ‎ 9.2 x 9.2 x 19.3 inches; 15 Pounds
  • Item model number ‏ : ‎ OFPSYS
  • Date First Available ‏ : ‎ June 14, 2016
  • Manufacturer ‏ : ‎ Watts
  • ASIN ‏ : ‎ B01H273O4M
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.3 4.3 out of 5 stars 215 ratings

Product Description

OneFlow Plus Salt-Free Scale Reduction and Water Filtration Systems use a commercially trusted, physical water treatment technology to keep scale from forming on pipes and reducing appliance life, along with a high-capacity water filter to remove foul tastes, odors, and sediments for better tasting tap water. A single, compact unit with dual cartridges replaces a space-consuming water softening system and water filtration system — using no salt, chemicals, and electricity. OneFlow Plus is an intelligent scale solution and is a great salt-free alternative to water softening (ion exchange) or scale sequestering devices. OneFlow Plus system is certified by the Water Quality Association (WQA) to NSF/ANSI Standard 372 for lead free. The carbon block used in the OFPRFC carbon filter is certified to NSF/ANSI 42. Watts Water Technologies OneFlow Anti Scale Media is certified by the Water Quality Association (WQA) to NSF/ANSI Standard 61.

Important information

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From the manufacturer

OneFlow+, antiscale system, water filtration

OneFlow+ Water Supply Requirements

Maganese < 0.05 mg/L
Iron, Ferrous < 0.3 mg/L
Chlorine < 3 ppm
Copper < 1.3 mg/L
Max Hardness 75 Grains per Gallon
pH 6.5 to 8.5
Working Temperature 40-100 Degrees Farenheight
Working Pressure 10-90 PSI
Size 10" x 10" x 18"
Rated Flow Max 10 gpm
Oneflow+

logo, water filter
What to Know

OneFlow+ 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.

  • Water known to have heavy loads of dirt and debris may require pre-filtration prior to OneFlow+

OneFlow + Water Filtration System

Salt-Free Scale Prevention PLUS Water Filtration

OneFlow+ prevents hard water scale buildup in pipes and appliances and removes harmful contaminants for better tasting water. OneFlow+ uses a unique technology called Template Assisted Crystallization (TAC), which attracts and converts dissolved water hardness minerals into microscopic crystals. These crystals flow harmlessly through the plumbing system to the drain, keeping your pipes and appliances free of scale.

  • OneFlow+ is easily installed on a floor or mounted to a wall
  • Virtually maintenance free for up to 3 years
  • Saves money on energy costs and plumbing system repairs
  • Systems using OneFlow+ technology effectively control lime-scale formation inside plumbing systems at hardness levels up to 30 grains per gallon
  • **Testing should be performed to determine proper application where hardness levels exceed 30 grains per gallon

Features

appliance efficiency

oneflow,antiscale,water

oneflow, watts premier

Improves Appliance Efficiency

OneFlow+ scale prevention technology reduces hard water scale buildup in pipes to extend the life of appliances and plumbing systems.

Great Tasting Water at Every Tap

Rated to 20 microns, the integrated high-capacity radial flow carbon block filter reduces chlorine, bad tastes, odors, and other harmful contaminants for great tasting, clean water.

Good for the Earth

An increasing number of municipalities ban the use of traditional water softeners due to the high salinity of the wastewater. With zero wastewater to drain, OneFlow+ is helping to meet those guidelines.

Whole House Water filter scale filter Carbon filter Carbon Filter + Scale filter whole house filter
OneFlowPlus Water Filtration System Scale Filter Carbon Filter Carbon + Scale Filter Whole House Filtration System
Customer Reviews
4.3 out of 5 stars
215
4.3 out of 5 stars
215
4.3 out of 5 stars
215
4.3 out of 5 stars
215
4.2 out of 5 stars
74
Capacity Up to 50K and 250K gallons Up to 250,000 gallons Up to 50,000 gallons Up to 50K and 250K gallons Up to 50,000 gallons
Function/Usage Removes chlorine taste and odor, reduces sediment and scale formation Reduces scale formation Removes chlorine taste and odor, and reduces sediment Removes chlorine taste and odor, reduces sediment and scale formation Reduces sediment, dirt, and rust
Replacement Filters every 12 months & 3 years Every 3 years Every 12months 12 months & 3 years Every 3 - 6 months

What's in the box

  • Scale Prevention and Water System
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.3 out of 5 stars
    4.3 out of 5
    215 global ratings

    Customers say

    Customers like the ease of installation using the potable water filter. They mention that it's easy to install and has a fantastic high flow filter. Customers are also happy with ease of replacement, and taste. However, some customers have reported durability issues with the filter, with some customers saying that the filter broke with the first filter replacement. Customers disagree on performance, and value.

    AI-generated from the text of customer reviews

    8 customers mention8 positive0 negative

    Customers find the installation process of the water filter to be easy. They mention that it has a big impact on the water taste and that it tastes great.

    "...Over all extremely satisfied with the installation process, the only difficulty was my inability to properly apply the silicone tape properly the..." Read more

    "...I have recommended to friends and neighbors. It was easy to install using shark bite and plastic fittings." Read more

    "This water filter system was very easy to install. I put it at my well location so the water is filtered coming into my house...." Read more

    "...It was easy to install, came with all the filters and conditioners that were needed, so my high recommendation is based on the extensive research..." Read more

    7 customers mention5 positive2 negative

    Customers like the flow of the water filter. For example, they mention it's a fantastic high flow filter and anti-scale system that improves water quality and clarity. Some say that the product is a great product for Southern California water.

    "...Things were fine and water quality did seem better until this month. Now cracks have appeared above the inlet and outlet ports in the tank itself...." Read more

    "Improved water quality and clarity..." Read more

    "...last filter has only lasted 2 months before a significant reduction in water pressure was observed...." Read more

    "Fantastic high flow filter/anti-scale system..." Read more

    4 customers mention4 positive0 negative

    Customers find the potable water filter easy to replace. They mention that it is easy to do so and that it easily replaced their current filter.

    "...Works excellent and super easy to change out the filter. Lasted a full year." Read more

    "Best filter on the market. Easy to replace cartridges. Scary what’s in our water. When I replaced mine the year old filter was orange!" Read more

    "Easy replacements" Read more

    "Easily replaced my current filter..." Read more

    4 customers mention4 positive0 negative

    Customers are satisfied with the taste of the water filter. They say that it makes the water taste great and that the old chlorine odor is hardly present.

    "...Tap water is now plenty satisfying to drink and the old chlorine odor is hardly present, if at all...." Read more

    "...Everyone comments on how good the water tastes and we have not seen any scaling on sinks, etc. Dishes come out of the dishwasher spotless." Read more

    "...And it is true. Love the taste of the water and know it is filtering out all the bad stuff for me." Read more

    "helps make water Tast better and clearer" Read more

    3 customers mention3 positive0 negative

    Customers like the smell of the water filter. They say it's crystal clear, has no sulfur smell, and tastes great. They also mention that they can drink from any faucet and enjoy clean smelling and tasting water.

    "...Tap water is now plenty satisfying to drink and the old chlorine odor is hardly present, if at all...." Read more

    "Love being able to take a drink from any faucet and enjoy clean smelling and tasting water. Water pressure dropped significantly after 14 month...." Read more

    "...It’s crystal clear, no sulfur smell and it taste great" Read more

    11 customers mention7 positive4 negative

    Customers are mixed about the performance of the water filter. Some mention that it works excellent and super easy to change out the filter, while others say that they appear that the units are not very effective for any period of time for, and within a few months the improvements had ceased. They also say that it is a waste of money and does not take hardness away.

    "...Works excellent and super easy to change out the filter. Lasted a full year." Read more

    "It would appear that these units are not very effective for any period of time for folks with well water...." Read more

    "Works great for our household water from taste to slowing down calcium deposit on faucets and water heater." Read more

    "Works just like advertised. No surprise to me...." Read more

    10 customers mention5 positive5 negative

    Customers are mixed about the value of the potable water filter. Some mention that they are very happy with the price point, while others say that it is a very expensive proposition and not worth the money.

    "...for you, but in our book, we've certainly found the system to be worth the money." Read more

    "...I think it is a little expensive compared to other filters, however it also softens the water by removing scale ( Calcium and Magnesium ) as wells..." Read more

    "...But we find the value to be well worth it. There’s clearly a benefit to our fixtures and plumbing...." Read more

    "...My filters need replaced and the price is insane so after tons of research this is what i recommend...." Read more

    4 customers mention0 positive4 negative

    Customers are disappointed with the durability of the water filter. They mention that it comes with pieces cracked and broken, and that the water flow internally broke with the first filter replacement.

    "...Now cracks have appeared above the inlet and outlet ports in the tank itself...." Read more

    "...One part that directs water flow internally, broke with the first filter replacement...." Read more

    "This came with pieces cracked and broken. My father who helped install managed to fix them so that it was still useful...." Read more

    "small plastic part was broken - no big deal, waiting to hear from the manufacturer..." Read more

    Wonderful having full house filtered
    5 Stars
    Wonderful having full house filtered
    Love being able to take a drink from any faucet and enjoy clean smelling and tasting water. Water pressure dropped significantly after 14 month. Swapped to find the old Olten cakes with sediment from the municipal water system in Washington DC. Will just make a pint of swapping it every 9 months.Yes, it’s a lot more expensive than using a drinking water filter for drinking water only. But we find the value to be well worth it. There’s clearly a benefit to our fixtures and plumbing. We’re confident that all of the water in the house has been well filtered. And we generally just drink more water when we can go to any tap in the house and fill up a cup rather than going down to the kitchen and pouring from a Britta filter.
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    Top reviews from the United States

    Reviewed in the United States on January 9, 2024
    Size: System + Carbon Block & Scale Reduction FiltersStyle: Water FilterVerified Purchase
    2 people found this helpful
    Report
    Reviewed in the United States on December 31, 2019
    Size: System + Carbon Block & Scale Reduction FiltersStyle: Water FilterVerified Purchase
    Customer image
    5.0 out of 5 stars Noticeable difference for a fractional cost, and some wrenching
    Reviewed in the United States on December 31, 2019
    We didn’t want an actual softener for myriad reasons but we needed a solution for the extremely hard water. After a week of research we settled in giving this a shot and have not been disappointed.

    Our house is new construction and I finally installed this filter after we’d been here for a month, and already fixture were accumulating scaling and we were running vinegar through the dishwasher. We saw that stop within a coyote days and while standing water that evaporate will leaves spots, those spots are more a dusty residue that easily wipes up. We are running the filter in sequence with an electromagnetic descaler (HQUA), which was installed simultaneously, so it is difficult to say how much effect is compounded by the joint treatment.

    The carbon filter does exactly what it’s supposed to. Tap water is now plenty satisfying to drink and the old chlorine odor is hardly present, if at all.

    Over all extremely satisfied with the installation process, the only difficulty was my inability to properly apply the silicone tape properly the first time to the brass threading.
    Images in this review
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    Customer image
    19 people found this helpful
    Report
    Reviewed in the United States on November 8, 2017
    Size: System + Carbon Block & Scale Reduction FiltersStyle: Water FilterVerified Purchase
    21 people found this helpful
    Report
    Reviewed in the United States on January 14, 2023
    Size: Carbon Block Water Filter ReplacementStyle: Water FilterVerified Purchase
    Customer image
    5.0 out of 5 stars Wonderful having full house filtered
    Reviewed in the United States on January 14, 2023
    Love being able to take a drink from any faucet and enjoy clean smelling and tasting water. Water pressure dropped significantly after 14 month. Swapped to find the old Olten cakes with sediment from the municipal water system in Washington DC. Will just make a pint of swapping it every 9 months.

    Yes, it’s a lot more expensive than using a drinking water filter for drinking water only. But we find the value to be well worth it. There’s clearly a benefit to our fixtures and plumbing. We’re confident that all of the water in the house has been well filtered. And we generally just drink more water when we can go to any tap in the house and fill up a cup rather than going down to the kitchen and pouring from a Britta filter.
    Images in this review
    Customer image Customer image
    Customer imageCustomer image
    2 people found this helpful
    Report
    Reviewed in the United States on April 17, 2020
    Size: System + Carbon Block & Scale Reduction FiltersStyle: Water FilterVerified Purchase
    15 people found this helpful
    Report
    Reviewed in the United States on September 27, 2023
    Size: System + Carbon Block & Scale Reduction FiltersStyle: Water FilterVerified Purchase
    3 people found this helpful
    Report
    Reviewed in the United States on April 22, 2021
    Size: System + Carbon Block & Scale Reduction FiltersStyle: Water FilterVerified Purchase
    One person found this helpful
    Report
    Reviewed in the United States on December 2, 2020
    Size: System + Carbon Block & Scale Reduction FiltersStyle: Water FilterVerified Purchase
    Customer image
    5.0 out of 5 stars Leaking Fittings
    Reviewed in the United States on December 2, 2020
    I just finished installing this unit to replace a Colligan salt unit. I had problems with the threaded inlet/outlet adaptors leaking through the threads. I tried Teflon tape three times before using tfe paste which so far has fixed the problem.
    Other things to consider would be putting shutoff valves on both sides of the filter and a bypass system (if you have room) to bypass the filter and still have water to your house. The valve on the outlet side keeps your house plumbing system from draining back to the filter.
    Some people have noted the filter cost vrs salt costs. Our current salt price is over six dollars per bag. At two bags per month that is $432 for three years. Of course, there will be differences depending on water hardness and water usage.
    It might be helpful for some people if Watts could supply 3/4" inlet/outlet fittings instead of one inch. Many older homes have 3/4" piping. The new home we were living in in 2007 had one inch service lines.
    Images in this review
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    5 people found this helpful
    Report

    Top reviews from other countries

    brian m
    4.0 out of 5 stars Does exactly what it says it will do
    Reviewed in Canada on December 14, 2020
    Size: System + Carbon Block & Scale Reduction FiltersStyle: Water FilterVerified Purchase
    2 people found this helpful
    Report