Updated 20/05/26
With so many makes and models on the market, it’s easy to feel overwhelmed when choosing the right water softener for your home or business. The right choice depends on the size of your property, how much water you use, your plumbing setup, and your budget. The best system for your neighbour may not be the best one for you.
We always recommend booking a free home survey with one of our experts so we can make a tailored recommendation based on your actual property. But before you get to that stage, this guide walks you through the key decisions and what each one means in practice.
Electric or non-electric water softeners
The first decision is whether to go with an electric or non-electric system, and there’s a meaningful difference between the two.
Electric water softeners regenerate on a set timer. They’re straightforward to fit and the technology is well established, but they have one weakness. The timer doesn’t know how much water you’ve actually used. That means the system can either regenerate too early (wasting salt) or run out of soft water capacity before the next scheduled regeneration (sending hard water through your taps).
Non-electric water softeners measure the volume of water passing through the system and only regenerate when the resin actually needs it. This is more efficient on salt and means you’re far less likely to get hard water unexpectedly. The trade-off is that they rely on your home’s water pressure to operate the valves, so very low-pressure properties may not suit them.
For most homes in Kent, we recommend non-electric metered softeners. They’re more efficient over the long run and the lack of an electrical connection makes installation simpler.
Single tank or twin tank
The two main types of water softener, single tank and twin tank, each have genuine pros and cons.
Single tank softeners are simpler in design with fewer component parts, which means less to go wrong and lower running costs. Most use tablet or granular salt. The one limitation is that when the system is regenerating, only hard water is available, though modern single tank units are programmed to regenerate overnight, so you’d rarely notice.
Twin tank softeners have two resin tanks, so when one is regenerating, the other keeps supplying soft water. This means truly 24/7 softened water with no interruption. Most twin tank systems use block salt, which many homeowners find easier to handle than tablets. Water flow can fluctuate slightly during regeneration, but for most households this is barely noticeable.
If you have a large household with high overnight water usage, such as a big family, an early-morning shift pattern, or a holiday let, a twin tank is worth the extra investment. For most standard family homes, a quality single tank softener does the job perfectly well.
Will I have softened water 24/7?
This is one of the most common questions we get asked, and it follows on from the tank decision above.
The honest answer is yes, but how it’s achieved depends on the system. A single tank softener regenerates when you’re not using water (typically the early hours of the morning), and the technology ensures plenty of softening capacity throughout the day. You won’t notice any gap in supply.
A twin tank system never goes fully offline because one tank takes over while the other regenerates. So while both deliver soft water on demand, only a twin tank delivers it without any brief regeneration window at all.
Salt type: tablet, granular, or block
Most modern water softeners use either tablet/granular salt or block salt. Both are widely available and reasonably priced.
Tablet and granular salt are loaded loose into the salt tank and tend to be slightly cheaper per kilo. They’re a sensible choice if your softener is in an accessible spot like a garage or utility room.
Block salt comes in pre-formed blocks that simply lift into place. It’s cleaner to handle, easier to store, and much simpler if your softener is tucked under a kitchen sink where lifting bags of granular salt is awkward.
Whichever you choose, we can include salt supply as part of an ongoing service so you never run out.
Choosing the right size
Modern water softeners are generally compact, and many models are designed to fit neatly under a kitchen sink. But the physical size of the unit is the wrong thing to focus on. What matters is the softening capacity.
A small unit in a smaller home with two or three residents will work brilliantly and be cheap to run. Put the same unit in a five-bedroom family home and you’ll regenerate constantly, burn through salt, and shorten the lifespan of the system.
For larger households, you need a softener with a larger capacity. It costs a bit more upfront but works out cheaper to run and lasts longer because it isn’t being pushed to its limits day after day.
If space is the issue rather than household size, perhaps you’re in a flat, a smaller property, or a home where the mains aren’t easy to get to, it’s worth considering an under sink water softener instead. These compact units fit inside a kitchen cupboard and soften water at a single point of use, which works well for households that mainly want softened water for drinking, cooking, and washing dishes.
Water flow rate and pressure
Water flow becomes relevant when you start thinking about larger properties and modern plumbing systems.
Most homes won’t notice any drop in flow rate with a properly specified water softener. Older properties with gravity-fed systems (water tank in the loft) rely on the height of the tank for pressure, and standard softeners cope easily.
Newer homes and larger properties typically use direct-feed systems with megaflow cylinders or combi boilers, which depend on the pressure of the incoming mains. These setups often have larger pipework, usually 22mm or 28mm rather than the standard 15mm, and need a softener specifically designed to handle the higher flow rate.
This is exactly the kind of detail we’d pick up during a free home survey, so you don’t need to worry about getting it right yourself.
How much does a water softener cost?
The headline cost is usually the question that comes up first. Water softeners start from £1595 with Aquasoft.
All systems will give you softened water, but some do it more reliably and efficiently than others. The cheapest option isn’t always the most cost-effective once you factor in salt usage, lifespan, and the cost of repairs or replacement down the line.
A few things worth knowing:
- We offer refurbished units at a lower price point, fully serviced and warrantied
- We run a rental scheme for households that prefer to spread the cost
- A good water softener can pay for itself over time through reduced limescale damage to your boiler, appliances, and bathroom fittings
You can read more about how a softener can actually save you money in our cost saving blog.
Book a free home survey in Kent
The right water softener for you depends on too many factors to confidently choose from a website alone. Household size, water hardness, plumbing setup, space available, and budget all play a part, and the best system is the one that fits all of those properly.
Aquasoft UK has been installing and servicing water softeners across Canterbury, Whitstable, Herne Bay, Faversham, Ashford, and the surrounding Kent area for years. We’re members of the AIWSE (Association of Independent Water Softener Experts), which means you get independent, honest advice, not a sales pitch.
Book your free, no-obligation home survey today and we’ll find the best option for your home and your budget.