Anti-Scale High-Flow Filter

Original price was: $13000.25 % OFFCurrent price is: $9750.12 interest-free installments of $ 813

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Each PURA BIG SOFT is designed for a specific function: to prevent scale buildup and clean pipes from existing scale. Thanks to the crystals formulated with Sodium Hexametaphosphate, our technology neutralizes the scaling action in all types, materials, and diameters of pipes.


  • Limescale
  • Remove limescale build-up
  • Maximum perfromance: HMFS (Sodium Hexametaphosphate) professional-grade technology for higher performance and dual-action effectiveness (preventing scale formation and cleaning existing scale).
  • Compact and easy installation design.
  • Low pressure loss.
  • Made from sterilized elements to prevent bacterial attack.
  • Surface with antimicrobial treatment.
  • Corrosion-resistant materials.
  • BPA FREE. Food Grade Components.
  • Ideal for a wide range of applications, including residential, commercial, and industrial use.
  • Specifically designed for water treatment, they do not produce tastes, odors, or colors in the water.
  • Limited lifetime warranty. Guaranteed lifespan of over 20 years.

Scale-Free Water

Uses: As a scale inhibitor filter installed prior to a water tank (cistern, water tank). As a scale inhibitor filter installed prior to a machine that needs protection.

Cutting-Edge Technology

The PURA SOFT Anti-Scale Core is made up of small amorphous crystals of high-purity Sodium Hexametaphosphate. The technology of the materials and manufacturing provides the highest rigidity, durability, and ensures that the dissolution effect in the water is optimal.

Due to the quality of our raw materials, components, and advanced manufacturing process, PURA SOFT is of technical grade, for professional use, without adding harmful elements to the treated fluid, nor any taste or odor, making it ideal for applications where scale formation needs to be eliminated and prevented from spreading.


PURA BIG SOFT is designed for convenience and ease of installation. With no electrical connection required, this filter can be installed in a variety of locations, including outdoor settings.
PURA BIG SOFT can be easily installed:

1. Before the elevated water tank.
2. Before a cistern.
3. Directly in the house’s water inlet pipe.
4. After the lifting pump from the cistern to the elevated tank.
5. After the pressurizing pump at the cistern outlet.
6. After the pressurizing pump at the elevated tank outlet.
7. At the outlet of the submersible pump.
8. At the hydro-pneumatic tank.

Shield everything you need from stubborn limescale buildup, all in one centralized solution with PURA BIG STOP.

Here’s how we easily install PURA BIG SOFT in just 10 steps:

1. Turn off the water supply: Locate the main water valve and turn it off to prevent water flow during installation.
2. Prepare the filter: Remove the filter from its packaging and inspect it for any damage.
3. Position the filter: Identify the inlet and outlet ports on the filter.
4. Connect the inlet: Thread a 3/4″ pipe to the inlet port of the filter. Use an accessory if your original pipe has a different size.
5. Connect the outlet:Thread a 3/4″ pipe to the inlet port of the filter. Use an accessory if your original pipe has a different size.
6. Mount the filter: If necessary, mount the filter securely using screws or brackets. Ensure it is stable and does not move.
7. Turn on the water: Once the filter is securely installed, turn on the main water valve to allow water flow through the filter.
8. Check for leaks: Inspect the connections for any leaks. Tighten the hose clamps if necessary to stop any leaks.
9. Flush the system: Run water through the filter for a minute to flush out any air.
10. Enjoy not having limescale: Your PURA BIG SOFT is now installed and ready to protect all your appliances from limescale buildup.


A lifelong equipment with simple maintenance

  • Easy Change and Worry Free. Easy, quick, and safe Anti-Scale Core replacement, the only maintenance required.
  • We’ll notify you when it’s time to replace your Anti-Scale Core.
  • Get your original PURA replacement, always, when you need it.
  • No special maintenance required. No cleaning needed.
  • Limited lifetime warranty.
Min. Temperature 35°F
Max. Temperature 125°F
Min. Pressure 6 psi
Max. Flowrate 1,100 GPH
Electric consumption No
Diameter 4 in
Total height 12 in
Service Life 96,000 gallons

The NBR gasket closure system makes it leak-proof.


PURA is certified by:

*Water Quality Association *PURA Pro Series *Adjut Kosher *B-Corp Certified *EPA (Environmental Protection Agency)

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