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Rinnai 3/4” Feed ScaleCutter System

Rinnai 3/4” Feed ScaleCutter System

Regular price $328.00
Regular price Sale price $328.00
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ScaleCutter Refill Cartridge

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ScaleCutter Refill Cartridge

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The SFES Scale Cutter Water Conditioning system works to prevent limescale buildup and corrosion within the water heating unit. Scale Cutter reduces the minerals in solution, coats surfaces with corrosion control layer, and helps to alter, soften, and remove existing limescale. This system offers many of the traditional benefits of a water softener at a lower cost.

It works by simply preventing the number of minerals found in potable water to prevent lime-scale buildup and corrosion that can diminish hot water performance within the appliance. The Scale Cutter offers similar benefits to traditional water softeners.


  • Keeping scale-causing minerals in solution inhibiting limescale formation
  • Changes the shape of the precipitated lime scale preventing the accumulation
  • Coats wetted surfaces with a micro-thin layer that provides corrosion control
  • Helps soften and remove existing limescale over time


Product Height 3 1/2 in
Product Width 5 in
Product Depth 5 in
Product Weight 4.4 lbs
Water Connection 3/4" NPT


To connect with a Rinnai-trained installer, you can utilize the Rinnai Dealer Locator by visiting the link: Alternatively, you can directly reach out to Rinnai's dedicated customer support team via the Toll-Free Number: 1 (800) 621-9419.

Documents & Files

Installation Manuals Download

Options and Accessories

4" ScaleCutter Refill Cartridge

  • For use with Rinnai Tankless water heaters
  • ScaleCutter system refill cartridge 3/4-inches
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