Updated 13/10/25
Installing a water softener can make a huge difference to your home, but before you take the plunge, it’s natural to have a few questions. Here, we answer some of the most common water softener questions to help you understand how they work, what they cost, and whether they’re right for you.
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What is hard water and why do I need a water softener?
If you live in a hard water area, you’ve probably noticed the tell-tale signs — limescale around your taps, streaks on your shower screen, and a kettle that furs up faster than you can clean it. Over time, hard water can damage your plumbing, shorten the life of your appliances, and even leave your skin and hair feeling dry.
Hard water is water that contains a high level of dissolved minerals, primarily calcium and magnesium. These minerals build up as naturally soft rainwater passes through layers of rock — especially chalk and limestone — and collects mineral deposits along the way.
The harder your water, the more likely you’ll notice limescale buildup, soap scum, and poor lathering with detergents. Over time, hard water can also reduce the efficiency of your boiler and shorten the lifespan of household appliances such as washing machines and dishwashers.
A water softener works by removing those hardness minerals, protecting your plumbing, and giving you softer water throughout your home.
How is hard water measured (and how can I test mine)?
Water hardness is measured in parts per million (ppm) — or sometimes in degrees of hardness (°H). Soft water areas typically have under 60ppm, while very hard water areas have over 180ppm.
If you’re unsure about your local water hardness, you can order an inexpensive home water test kit, or check with your water supplier. Many UK homes, particularly in the South East, experience hard water, which is why water softeners in Kent and the surrounding areas are so popular.
If you notice cloudy glassware, chalky deposits on your taps, or soap that won’t lather, chances are your home could benefit from a softener.
How does a water softener work?
A water softener uses a process called ion exchange to remove hardness minerals from your water.
Here’s how it works:
- Hard water enters your softener and passes through a resin bed containing tiny resin beads.
- The calcium and magnesium ions in the water are attracted to the resin.
- In exchange, sodium ions are released into the water — softening it as it flows into your home.
Over time, the resin beads become saturated with minerals and need to be cleaned. This is called regeneration, and it’s done using a special salt that flushes away the collected calcium and magnesium. Once the system regenerates, it’s ready to go again.
The process is automatic, efficient, and ensures your home receives consistently soft water.
Can I drink softened water?
This is one of the most common questions about water softeners, and the answer is usually yes — but it depends on your personal preference and local water quality.
Softened water contains slightly more sodium than hard water due to the ion exchange process, but the difference is minimal. In fact, there’s typically more sodium in a glass of milk than in a glass of softened water. Millions of people across the UK have been drinking softened water since the 1920s without any health concerns.
However, for peace of mind, many homeowners choose to have a separate filtered water drinking tap installed in their kitchen, so you have both options available.
What are the benefits of having a water softener installed?
Aside from removing limescale and improving the look and feel of your water, soft water has a range of practical and financial benefits:
- Longer-lasting appliances – Boilers, washing machines and dishwashers work more efficiently and last longer.
- Easier cleaning – No limescale on taps, shower doors, or tiles.
- Lower energy bills – Scale buildup can increase heating costs; removing it helps your system run efficiently.
- Softer skin and hair – Many people find their skin feels smoother and their hair shinier after switching to soft water.
- Cleaner laundry – Clothes wash better and feel softer as detergents lather more effectively.
These everyday benefits make a home water softener system a long-term investment rather than a luxury.
How much does a water softener cost to run?
After installation, water softeners are surprisingly inexpensive to run. Most modern models are energy-efficient and use little or no electricity.
You’ll need to top up the salt levels regularly — usually costing just a few pounds a month — and have the system serviced annually to keep it running smoothly. The resin inside the softener typically lasts 10–15 years before needing replacement, depending on your water hardness and usage.
The savings from reduced energy bills, lower cleaning product use, and longer appliance lifespan often outweigh these minimal running costs.
Are water softeners environmentally friendly?
This is a growing consideration for many homeowners. While water softeners do use salt, the environmental impact is very small — especially when weighed against the efficiency benefits. By preventing scale buildup, you use less detergent, run your appliances more efficiently, and extend their life, which all contributes to a more sustainable home.
How long does a water softener last?
With proper maintenance, a quality water softener can last 15–20 years or more. Regular servicing and timely salt refills help to keep the system performing at its best.
When choosing a softener, look for WRAS-approved systems from trusted brands and professional installation to ensure reliability and compliance with UK water regulations.
More Water Softener Questions?
If you’re tired of limescale and ready to enjoy the benefits of soft water, now’s the time to explore your options. Whether you’re looking for a compact domestic unit or a system for a larger home, our team can recommend the best water softener for your property and water type.
Get in touch today to ask us your water softener questions, or if you’re ready to arrange a free consultation and start enjoying cleaner, softer water throughout your home.