Limescale build-up in water heaters is a common problem, especially in areas with hard water. Limescale can build up on the heating element and tank walls, reducing the water heater’s efficiency, increasing energy consumption and shortening the appliance’s lifespan. Fortunately, there are solutions to prevent limescale build-up and keep your water heater running smoothly over the long term. In this article, we explain the best ways to avoid this problem.
Understanding limescale and its effects
Why does limestone form?
Limescale consists mainly of calcium carbonate, which forms when water contains a high concentration of dissolved minerals, notably calcium and magnesium. When hot water comes into contact with water heater surfaces, these minerals are deposited as scale, particularly on the heating element and in the tank.
Effects of limescale on water heaters
Limescale build-up has several negative effects:
- Reduced efficiency: Limescale acts as an insulating barrier around the heating element, making the water heater less efficient and requiring more energy to heat the water.
- Increased energy costs: A water heater clogged with limescale consumes more energy, resulting in higher heating bills.
- Shorter appliance life: Corrosion and premature wear of water heater components are often caused by limescale build-up.
Solutions to prevent limescale build-up
Installing a water softener
One of the most effective ways of preventing limescale build-up in your water heater is to install a water softener. This device reduces water hardness by eliminating calcium and magnesium, the main causes of limescale build-up. This prevents limescale deposits in your pipes and water heater.
Advantages of a water softener :
- Prevent limescale build-up in water heaters and other household appliances.
- Extend the life of your water heater and plumbing system.
- Greater energy efficiency thanks to improved water circulation.
Use anti-scale water heaters
Some water heaters are equipped with anti-scale devices, such as stainless steel protectors or magnesium anodes. These technologies limit the build-up of limescale by disrupting the formation of deposits or eliminating them before they settle on the tank walls.
Regular heater cleaning
Even with preventive solutions such as a water softener, it’s important to clean your water heater regularly to prevent limescale build-up. This can be done by descaling the tank and heating element. Descaling involves circulating an acid solution (usually white vinegar or a specific descaling agent) through the system to dissolve limescale deposits.
Cleaning frequency:
We recommend cleaning your water heater once a year, or every two years, depending on water hardness and frequency of use.
Reduce water temperature
Water temperatures that are too high encourage the formation of limescale. By slightly reducing the temperature of your water heater, you can limit the rate at which limescale deposits form. The ideal temperature for a water heater is generally around 55°C to 60°C.
Installing an anti-scale filter
An anti-scale filter can be installed directly on the cold water inlet pipes to your water heater. These filters are designed to trap the minerals responsible for limescale build-up before they enter your water heater tank.
Advantages of anti-scale filters :
- Simple, efficient installation.
- Protect other household appliances from limescale deposits.
Why choose Leader Services to maintain your water heater?
At Leader Services, we specialize in the maintenance, repair and installation of water heaters. Our experts will advise you on the best solutions to prevent scale build-up and ensure optimum performance from your water heater. Regular maintenance ensures the longevity of your appliance and optimizes its energy efficiency.
Discover our services
For more information on our water heater maintenance and descaling services, see our dedicated Leader Services – Water heaters page.
Contact us
If you’d like to find out more about preventing limescale build-up, or if you need maintenance for your water heater, contact us today via our contact form. Our professionals are here to offer you solutions tailored to your needs.
