Poly Salt-Free Water Softener Review (2023)

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🧾 Overview

The Poly Triple Action Water Softener is a modern, space-saving take on a saltless water softener. The tiny kit combines all the functions of a standard softening unit, while being completely salt-free and resin-free.

The unit comes loaded with polyphosphate, which dissolves into the water that passes through the tank. This binds to calcium and magnesium minerals, which are responsible for the limescale deposited by hard water, and alter their form to prevent them from being able to do so.

For ultra convenience, the Poly softener is lightweight and comes pre-assembled. It features a 50-micron reusable filter, which is easily removable for cleaning. The plastic used in the system is BPA-free, helping to soften your water without affecting its quality.

If you’re looking for a water softener you can install outside, the Poly is designed to withstand harsher temperatures and weather conditions. The unit offers 3-in-1 conditioning, first filtering water, then conditioning and softening them.

💡 Features

  • Polyphosphate tank for softening water.
  • 50-micron reusable filter.
  • Pre-assembled housing.
  • Wall-mounting bracket and other accessories for easy assembly.
  • User manual and instructions for installation.

🚦 Performance

The thorough softening process of the Poly is equally as effective as a standard salt based softening system. Although no salt is used, calcium and magnesium are held in suspension inside the system, preventing these hard water causing minerals from leaving limescale deposits in your home’s appliances.

One major advantage of being salt-free is that the Poly doesn’t waste water during the softening process, and you won’t need to worry about buying salt to ensure regular top-ups inside the tank. You’ll need to change the phosphate from time to time, but far less regularly than you’d need to top-up with salt (the manufacturer estimates it will last from 10 to 12 months).

The Poly water softener also doesn’t need to regenerate, and doesn’t require electricity to run, making it a cheaper and more energy-saving alternative to other saltless softening systems. It’ll protect all of your appliances from hard water problems, increasing their lifespan and helping you to cut down on your cleaning chores.

Learn more about the pros and cons of salt-free water softeners.

🔧 Installation & Maintenance

With its slim, compact design, you can quite easily install the Poly water softener at a space in your main water pipe that most suits you. The unit itself comes pre-assembled, and the polyphosphate beads are already inside, so you’ll only need to worry about installing the system at your pipe.

The unit is installed vertically, to allow the filter to drain properly. Some people may prefer to hire a plumber for installation help. A professional will be able to get the job done in 1 to 2 hours. That said, the Poly softener is designed for user installation, and you’ll find all the guidance you need in the instructions manual and online.

You won’t need to do much in terms of maintenance for the Poly triple action water softener. The key thing to remember if your filter cleaning and your phosphate changes.

The filter is reusable, so you’ll need to take it out every month or so and clean it out. This will prevent it from getting clogged up and ultimately help it to perform better. The polyphosphate beads are designed to last between 10 and 12 years, but it’s worth checking them after 6 months or so. Keep in mind that replacement times are based on average use, which you might exceed in your own home.

📝 System Info

Poly Salt Free Water SoftenerThe Poly triple action water softener might be a salt-free system, but it’s considered a softener, not a conditioner, because it does actually hold the calcium and magnesium minerals in suspension after altering their composition.

The softening process begins with a filter, which uses both polyphosphate and a 50-micron filter screen to remove impurities from water. This cleans the water, but at this stage, the water is still hard. It then moves into the system’s conditioning core, which breaks down calcium and magnesium to form crystals.

Finally, water is softened using the polyphosphate, which suspends the calcium and magnesium and prevents them from passing further into your home.

🔔 Pros & Cons


  • Salt-free water softener – requires no salt top-ups, suitable for people on low-sodium diets.
  • Filters, conditions and softens water in one.
  • Reusable filter makes for easy cleaning and eliminates replacement costs.
  • Polyphosphate beads have a fairly long lifespan – 10 to 12 months.
  • Unit comes pre-assembled with polyphosphate beads already added.
  • No need to wait for system regeneration – soft water is produced immediately, 24/7.


  • You may need a plumber for installation.
  • May not be as effective on particularly hard water.

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  • Brian Campbell
    Founder, Water Treatment Specialist

    Brian Campbell is a water treatment specialist and water expert based in Denver, Colorado. He's always been obsessed with water quality, and has spent years testing all kinds of treatment devices from simple pitchers and portable devices to complex whole home systems.

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