Single and double cylinder water softeners

There are many different types of water softener on the market today. We, at Harvey Water Softeners specialise in the twin cylinder non electrical version. We have been pioneering the technology for over 30 years and believe it to be the most definitive softener on the market. To explain we must go over the process of how water softening works.

Water softeners are attached to your water supply. Usually in the kitchen but also the garage or the roofspace, wherever is most accessible. Hard water enters the softening device at the top and washes down through the cylinder. This cylinder is full of resin beads to enact the process of ion exchange. The beads contain sodium ions supplied by salt that is fed into the device. As a result the calcium and magnesium ions are attracted by the resin beads, whilst the sodium content goes into the water. The hard minerals are removed from the water leaving the water to flow around your household softened.

Meanwhile, the water softener has to be regenerated, in which the magnesium and calcium ions are flushed from the system and the resin is recharged with sodium ions for treatment for the next batch of water. The regeneration process can take time, particularly when large quantities of water are being processed. It is also important that it occurs at a precise time, regenerating too soon after treatment and you will waste water. Leave it too late and hard water will get into your system. We have developed a displacement meter that is designed to trigger the regeneration process at exactly the right moment by measuring just how much soft water has been produced.

The process of ion exchange and regeneration take place within cylinders, some water softeners function on just a single cylinder, but more effective water softeners function using twin cylinders. Having two cylinders means that you can process greater quantities of hard water. For the average family of four, a single cylinder will have difficulty keeping up with demand since it won’t have time to regenerate properly, meaning that hard water will enter your systems. By contrast a dual cylinder water softener will regenerate constantly, alternating between the two cylinders to cope with demand.

To learn more about water softeners, check out our handy consumer’s guide to water softening.

Back to top