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About OneFlow® Scale Control Systems


Calcium scale in pipes and plumbing equipment often increases energy costs and can lead to expensive repairs to appliances such as hot water heaters, ice machines, coffee makers, and dishwashers. On the other hand, calcium is important to human health, and supplements are often recommended if this important mineral is totally reduced or absent from a person’s diet.

Water quality professionals now have a revolutionary product for fighting scale and retaining the benefits of calcium in water: OneFlow®. With OneFlow there’s no salt, no backwash, no scale, and no electricity to worry about. This environmentally-friendly solution eliminates sodium discharge by using Template Assisted Crystallization (TAC) technology to transform dissolved hardness minerals into harmless, inactive microscopic crystal particles. These particles make their way through plumbing systems without latching on to pipes, inside fixtures, valves, or heating elements. Scientifically tested for performance, OneFlow provides scale control results backed by years of successful field applications and independent studies. OneFlow from Watts is the intelligent choice in scale prevention.


  • No salt or chemicals required
  • Economical and efficient
  • Upflow design for better flow rates
  • No backwashing and zero discharge
  • Virtually maintenance free
  • Consistent scale control performance
  • Wide range of commercial applications
  • Uses environmentally friendly “green” technology
  • Long-lasting media needs no regeneration


  • Eliminates the need for scale prevention chemicals or salt
  • Eliminates de-scaling chemical costs
  • Reduces labor costs and downtime
  • Increases operating efficiencies
  • Extends life of capital equipment
  • Reverses existing scale problems
  • Provides immediate ROI through energy savings
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Water Hardness in Pipes