Hard Water Filters

Fountain Filters delivers high performance hard water filters to households across the UK.

We are specialists in solving all hard water problems, providing cost effective long-term solutions with a hard water filter for either your whole house or just your drinking water.

To make hard water filter product selection easier for you we have two sections below.

If you want to treat the limescale throughout your house choose mains hard water filters, and if you only want to reduce limescale in your drinking water select limescale water filters.

What is hard water?

Hard water has a high level of calcium and magnesium minerals, in combination with bicarbonate, sulphate and chloride.

Problems with limescale occur when hard water is heated, the balance between the dissolved minerals is upset and the bicarbonate converts to carbonate.

This is what causes limescale.

How to find the correct hard water filter

When it comes to choosing a water filter for hard water, there are a couple things to consider.

How much of your household water do you want to treat for limescale?

You need to decide how much of your household water you want to treat as we have different sizes and types of hard water filters for houses in the UK.

• Our limescale water filters treat your drinking water only.
• We then have two different types of mains hard water filters; some filters treat your cold water tap feed in your kitchen and others are suitable for your whole house. A hard water filter for the whole house is generally bigger than a kitchen sink hard water filter.

How much limescale do you have?

Firstly, use our handy tool to find out how hard the water is in your postcode.

We supply two different types of media in our filters for hard water.

• Polyphospate crystals – suitable for moderately hard water. These are inserted into the middle of our carbon block water filter cartridges.
• OneFlow media – suitable for all hard water areas. This is our best selling and most effective hard water filter for houses throughout the UK.

Benefits of using a hard water filter

The benefits of a hard water filter include:

• Scale and scum formation on the surface of your water or around hand basins, baths, and shower screens will stop.
• Soap will form a lather.
• Reduced limescale deposits on kettles, showers, and taps.
• Household appliances such as dishwashers, washing machines, immersion heaters, boilers will last longer.

How does a hard water filter work?

Hard water filters work by forcing water through the polyphosphate crystals or OneFlow media.

With the polyphosphate method a tiny amount is dissolved (sequestrated) into the water which inhibits the formation of scale – this is a chemical process.

OneFlow, also known as template or media assisted crystallisation (TAC or MAC), works in an entirely different way. 

OneFlow hard water filter media is a white sand like substance, and each grain has numerous crystallisation sites. The dissolved minerals (calcium and magnesium carbonate) are attracted to the sites where they “clump” together. These form microscopic crystals that then detach and flow out of the filter and through the plumbing without sticking and causing scale.

No chemicals are introduced, it is an entirely physical process.

Why buy your hard water filter from Fountain Filters

We are experts in solving limescale problems and recommending hard water filters for both whole house and drinking water.

We are ready for your call – 01352 838 281. Or you can message us on our help desk.

If you are not looking for a hard water filter, we have other mains water filters that will remove contaminants from your household water.