Fleck 5600 SXT Water Softener Review

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🧾 Overview

The Fleck 5600 is a whole home digital water softener that comes loaded with resin for an easier initial installation. The system uses smart technology to regenerate based on water use, helping you to save water in the long run and providing a more efficient performance.

Included in the system is 48,000 grains capacity of resin supplied by the manufacturer. According to Fleck, the resin is high quality, with an 8% bead strength rating. It’s also certified by the Water Quality Association, which tests the standards of water improvement systems in the US.

To analyze the performance of the Fleck water softener, the system comes with its own soft water soap test kit. You can use this kit before and after installation to measure the improvement in water softness.

The resin tank has a lifetime warranty, and, as an extra bonus, the manufacturer offers free shipping to anyone who lives nationally.

💡 Features

  • Digital metered control that measures water usage.
  • Drain line connector, 10′ of drain tubing and 6′ of brine tubing.
  • Compact turbine meter.
  • Downflow or upflow regeneration cycles.
  • Continuous flow rate of 20 GPM.
  • Resin and brine tank to store salt and water.
  • Bypass valve for diverting water to main pipe during maintenance.
  • Backwash filter.

🚦 Performance

The Fleck 5600 is designed with performance efficiency in mind. With a standard salt-based softener, there’s the potential for unnecessary water waste, as the system may run through regeneration cycles when it isn’t needed. The Fleck 5600 digitally calculates how much water has been used and only regenerates when it needs to.

The system also uses an upgraded paddle wheel meter for a more efficient performance. With a 48,000 grain capacity, you’re unlikely to ever have to wait around for soft water. The Fleck 5600 could easily produce the water required for a standard family household without persistent regeneration.

Owing to the fact that this softener is salt-based, it’ll waste a limited amount of water when it regenerates. Obviously, a saltless water softener doesn’t waste any water, but because the Fleck 5600 SXT fully removes hard water minerals, it can produce a more desirable end result.

Fleck 56SXT auto regeneration

🔧 Installation & Maintenance

You’re going to need a few basic plumbing skills, or the patience to try something fiddly, if you want to install the Fleck 5600 yourself. The system comes equipped with all the parts and instructions you’ll need for DIY setup, but as you’ll need to connect it to your main water pipe, things can get a little difficult.

Some people prefer to hire a plumber for installing their salt-based water softener. A plumber would be able to carry out the job in an hour, while it may take you more time to get the job done.

You’ll need to top up the salt in the Fleck 5600 when it runs low, and you’ll also need to clean out your tanks from time to time to prevent a build-up of grime. The system’s user manual should offer clear guidelines on how to look after the unit to ensure it lasts a long time.

The Fleck 5600 comes with a 5 year warranty on the valve and a 10 year warranty on the tanks, so if you do come across any faults, you’ll be able to order a replacement part free of charge.

📝 System Info

The Fleck 5600 is a salt-based softener, which means it uses the process of ion exchange to fully remove hard water causing minerals from a household’s drinking water. This water won’t leave limescale deposits on your pipes or appliances, and you’ll also benefit from better soap lathering, clean and shiny glassware, and healthier skin and hair.

The system has a single mineral tank and a brine tank. Water passing into the mineral tank flows through a bed of resin beads, charged with sodium ions. During ion exchange, the sodium replaces the calcium and magnesium ions in the water, making the water soft. As these hard water causing minerals are fully removed, the process is referred to as “softening” and not “conditioning”.

🔔 Pros & Cons


  • Softened water offers the most prominent benefits for household use.
  • Smart metered control based on water usage prevents unnecessary water waste.
  • Large 48,000 grain capacity for whole home use.
  • Comes stocked with resin in the tank.
  • Lifetime warranty on the resin tank.


  • More complex to install than salt-free system alternatives.
  • Wastes water during regeneration.
  • Requires occasional maintenance, sodium top-ups and cleaning.

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  • Laura Shallcross
    Senior Editor

    Laura is a passionate residential water treatment journalist who holds an undergraduate degree in Print Journalism and a master’s degree in Creative Writing. Over a span of 5 years she's written on a range of topics including water softening, well water treatment, and purification processes.

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