Salt-Free Scale Prevention PLUS Water Filtration

For DIY Home Owners

This space-saving, economical and environmentally-friendly solution is easy to install and virtually maintenance free – NO backwashing, NO salt, NO waste water and NO electricity.

OneFlow+ uses a unique technology called Template Assisted Crystallization (TAC), which attracts and converts "hard" minerals into harmless, inactive "soft" scale particles that stay suspended in water and flow freely through a system rather than sticking to pipes. TAC technology does not add or remove anything from water, allowing useful minerals such as calcium, potassium, and magnesium to remain – without adding sodium.

Smart Scale Prevention and Whole House Water Filtration from Watts

Rated the Most Effective Scale Prevention Technology*

Improves Appliance Efficiency
As water flows through the OneFlow+ Scale Prevention Cartridge, particles which cause scale build-up are prevented from sticking to pipes. This improves plumbing system water flow and helps extend the life of appliances.

Great-Tasting Water at Every Tap
The integrated high-capacity Radial Flow Carbon Block Filter Cartridge has a 20 micron rating, filtering both sediment and chlorine taste and odor.

Environmentally Friendly
An increasing number of municipalities ban the use of traditional water softeners due to the high salinity of the waste water. With zero waste water to drain, OneFlow+ is the environmentally friendly solution.

Save Up to $300 Annually
Without the need for the salt replacement and electricity required of traditional water softeners, OneFlow+ can save the average household up to $300 annually (based on a 4-person home using 75 gallons per person daily).

Flexible Installation
With its compact design, OneFlow+ can be installed on a floor or mounted to a wall with the included mounting bracket. Watch the OneFlow+ Installation Video.

Virtually Maintenance-Free
OneFlow+ has NO salt to monitor or replenish. The high capacity cartridges can be easily changed with the included multifunction tool. When you register the product, you will get FREE reminders when it’s time to replace the cartridges.

OneFlow+ Specifications

Rated Flow Maximum: 10 gallons per minute
Size: 10 in. x 10 in. x 18 in.
Minimum Net Weight: 15 lbs.


OFPSYS OneFlow+™ system is certified by the Water Quality Association (WQA) to NSF/ANSI Standard 372 for lead free.

OFPSP OneFlow scale prevention cartridge is certified by the Water Quality Association (WQA) to NSF/ANSI Standard 372 for lead free.

OFPRFC carbon filter is certified by the Water Quality Association (WQA) to NSF/ANSI Standard 372 for lead free.


Email Customer Service or call (800) 321-0500.


*WateReuse Research Foundation, Evaluation of Alternatives to Domestic Ion Exchange Water Softeners, 201