What is Commercial Water Softenening?

Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. Soft water extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes and fittings.

Water softening is traditionally achieved using ion-exchange resins where prevention of scale is the critical requirement. It can also form part of more advanced water treatment systems as an important pre-treatment to nanofiltration or reverse osmosis membranes.

Hard water can be a major headache for homeowners and businesses alike. It can cause a variety of problems, such as reducing the effectiveness of soap and leaving behind unsightly and difficult-to-clean mineral deposits. But with a water softener from Culligan, you can enjoy the benefits of soft water without any of the drawbacks.

Culligan has been a leader in water treatment technology for over 70 years, providing customers with safe, high-quality water for a wide range of applications. Their commercial water softeners are among the most comprehensive and effective on the market, helping to prevent scale build-up in pipes and extend the lifetime of your plumbing.

Don’t let hard water get in the way of enjoying clean, soft water for drinking, cooking, cleaning, and more. Choose Culligan and get the best water treatment solutions for your home or business, get a quote today.

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Please note: we are only able to handle enquiries from within the United Kingdom.
Commercial water softener

Why chose our “High Efficiency (HE)” range of Commercial and Industrial water softeners?

For high-efficiency water softening, nothing can match the intelligent technology of the Culligan HE high efficiency series of softeners. The patented technologies found in the Culligan HE Commercial water softener series optimise salt, water and electricity consumption by up to 46% over traditional softeners, making it the most efficient water softener in the world.

Scale in pipework
hardness scale shown in copper pipework before and after installing a water softener


  • Are you tired of dealing with the headaches of hard water in your commercial or industrial property? Do you want a water softener that is not only effective, but also compliant with building regulations and efficient in its use of resources? Look no further than Culligan’s HE (High Efficiency) Range of Commercial and Industrial water softeners.
  • Not only were these water softeners the first in the UK to be WRAS Approved, but they also feature patented technologies that optimize salt, water, and electricity consumption by up to 46% over traditional softeners. Plus, our Upflow regeneration allows for up to 24% high capacity at the same salt dosage when compared to down flow systems.
  • In addition, our Proportional Brining feature monitors water consumption and regenerates only the exhausted resin, and our Dial-a-Softness control valve allows consumers to set the softness required. Our patented Progressive Flow feature allows for sizing of softeners based on average water usage, and our Smart Controller gives you more control over your equipment with programming and monitoring – a requirement when a BMS input is needed for Commercial or Industrial applications.
  • With both our Multi-Piston Valve design and Culligan’s exclusive corrosion-resistant materials, you can be confident in the reliability, durability, and extended lifespan of your water softener. Contact us today to learn more and see how Culligan can help you enjoy the benefits of soft water in your property.

Culligan High Efficiency Softener

Reduces operating costs up to 46% with patented technologies to optimize salt, water and electricity consumption

Smart Controller & High Efficiency valve

  • Multiple language full text display
  • Easy to connect to remote display, building management systems, PLC’s etc
  • Optional modem connection can alert Culligan if salt is needed or needs service
  • Upflow regeneration to increase efficiency

Brine reclaim

Optional brine reclaim system returns portion of reusable brine back to brine tank during regeneration, saving up to 25% of salt usage


Only regenerate when required – using the optional aquasensor internal probe regenerations can be initiated only when the resin is nearing exhaustion

FRP tanks

High impact FRP tanks are used up to 48” tanks or steel tanks with food grade epoxy coatings for up to 120” diameters

Resin media

High efficiency Cullex® resin is used in Culligan softener systems. The resin consists of highly porous, amber coloured, plastic beads which are covered with "exchange sites" that preferentially remove hardness ions and replace them with sodium, a "soft" ion. Once exhausted the resin is “regenerated” using a salt water brine solution and the softening process begins again.

Brine tanks

Long lasting brine tanks with corrosion proof components, including smart-brine probe to predict when you will need more salt.

Progressive Flow

Using the progressive flow feature of the Culligan Smart Controller, softeners can be installed in a chain, and will come on and offline as the flow requires, allowing peak water usages to be managed.

Providing A Smart Solution to the water softening process

HE Duplex Alternating Twin

The Cullligan HE Duplex Alternating Twin provides uninterrupted conditioned water 24/7. Two independent mineral tanks provide a continuous supply of soft water; when one tank is exhausted, the second tank takes over while the first regenerates.

The duplex alternating system benefits from upflow** proportional regeneration, which allows up to 24% higher capacity at the same salt dosage when compared to down flow systems.

culligan he water softener twin alternating duplex

HE Progressive Flow

With Culligan’s patented Progressive Flow feature, you can size softeners based on average water usage, which helps reduce costs. The feature is best suited for applications requiring intermittent/periodic high flow rates.

The Culligan® Smart Controller monitors water demand and brings the additional tank(s) online or offline as the flow demand changes. In this formation up to 6 Culligan HE softeners can be connected in series.

culligan he duplex progressive water softener

How does a “Commercial and Industrial Water Softener” work

The exchange takes place by passing hard water over man-made ion exchange resin beads, in a suitable pressure vessel tank. The resin in most modern softeners consists of millions of tiny plastic beads, all of which are negatively charged exchange sites. The ions considered in this process (calcium, magnesium and sodium) are all positivly charged ions.

When the resin is in the base state, the negatively charged resin beads hold positively charged sodium ions. As the calcium and magnesium contact the resin beads in their travel through the resin tank, they displace the sodium ions from the exchange sites.

Resin is a crucial component of a water softener, and it plays a vital role in the water softening process. Resin is a type of synthetic polymer that is highly porous and has a strong affinity for certain ions, such as calcium and magnesium.

When hard water passes through the resin bed in a water softener, the resin beads attract and bind to the excess minerals, removing them from the water. This leaves the water soft and free of the mineral deposits that can cause problems in a property.

The resin beads can become saturated over time, and they must be regenerated to restore their effectiveness. This is typically done by running a solution of saltwater through the resin bed, which causes the excess minerals to be released from the resin beads and washed away. The resin is then ready to be used again, effectively removing excess minerals from the water.

The water softening process is achieved through the use of brine, which is a solution of water and salt. This brine is drawn from the brine tank and mixed with the salt in the reservoir, creating a concentrated solution.

The brine solution is then introduced to the resin bed, where it comes into contact with the resin beads loaded with calcium and magnesium ions. Even though the calcium and magnesium ions are more strongly charged than the sodium ions in the brine solution, the high concentration of sodium ions allows them to displace the calcium and magnesium ions.

This displacement process causes the sodium ions to be attracted to the negatively charged exchange sites on the resin beads, eventually taking up all of the available exchange sites. Once this process is complete, the resin is considered to be regenerated and ready for the next softening cycle.

Reach out to our specialists today to discuss the supply/specificcation of our HE Range Water Softeners

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