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Whole-house water filter

With the right water filter for your main water connection, you'll enjoy clean drinking water from the very start – and protect your water pipes throughout the entire house at the same time.

A water filter at the main water connection protects your entire house's plumbing system from dirt, rust particles, limescale, and other undesirable substances. Whether it's a new build or an old building – if you want to protect your pipes, fittings, and household appliances in the long term or simply enjoy clean drinking water, a high-quality whole-house water filter is essential. On this page, you'll learn why a water filter makes sense for your home, which models are available, and what to consider when buying one.

What is a Whole House Water Filter?
How Does a Home Water Filtration System Work?
Why is a Water Filter at the Main Connection Useful?
Does a Water Filter at the Main Connection Also Provide Clean Drinking Water?
What Types of Whole House Water Filters Are There?
Can a Whole House Water Filter Also Remove Limescale?
Which Water Filter is Right for My House?
How is a Whole House Water Filter Installed?
Frequently Asked Questions about Whole House Water Filters (FAQ)
Find the Right Water Filter for Your Main Connection Now

What is a Whole House Water Filter?

A whole house water filter – often also called a water filter for the main connection – is a filtration system installed directly after the water meter. It ensures that coarse impurities such as sand, rust, limescale particles, or other suspended solids do not even enter your domestic water pipes. Especially in regions with old pipe systems or high water hardness, such a filter is a sensible addition to protect your household appliances.

How Does a Home Water Filtration System Work?

A whole house water filter usually works on the principle of mechanical filtration: Water flows through a fine-mesh filter screen that retains particles such as sand, rust, sludge, or limescale residues from the tap water. These foreign substances often originate from the public pipe network – especially with older pipes or after maintenance work.

However, if it's not just about removing dirt particles but also about protection against limescale deposits, Evodrop uses a special, salt-free descaling process. The water is first passed through an ion sieve, which specifically reduces hardness-forming substances. Subsequently, a natural malic acid complex binds calcium and magnesium ions, effectively preventing limescale formation – completely without salt, electricity, or wastewater. This purely physical-chemical process is food-safe, taste-neutral, and achieves descaling rates of over 90% according to the manufacturer. This way, pipes and appliances are protected from limescale damage in the long term, without the typical side effects of conventional ion exchange systems.

Why is a Water Filter at the Main Connection Useful?

Protection against Dirt and Corrosion

Rust particles and dirt from the supply network enter your pipelines directly if there is no filter. This can lead to deposits, blockages, or corrosion.

Longer Lifespan for Appliances and Fixtures

Modern household appliances such as washing machines, dishwashers, or instantaneous water heaters are sensitive to particles in the water. A water filter protects them from premature wear.

Recommendation according to DIN 1988

The standard DIN EN 806-2 explicitly recommends the installation of a whole house water filter to protect the drinking water installation – even if it is not yet legally required.

Health Reasons

An increasingly important reason for installing a main connection filter is protection against particularly harmful substances, which are often not or only partially removed by wastewater treatment plants or can re-enter drinking water through old pipes. These include, among others:

PFAS & TFAS
Bacteria & Viruses
Heavy Metals
Micro & Nanoplastics
Synthetic Pesticides
Medicinal Residues
Chlorine

Does a Water Filter at the Main Connection Also Provide Clean Drinking Water?

Many consumers wonder if a whole house water filter also improves drinking water. The answer: Yes and no.

Inexpensive whole house water filters, such as backwash filters, remove particles like sand, rust, or limescale residues – this ensures clearer water, but it does not automatically mean a quality improvement in terms of pollutant reduction.

However, high-quality home water filtration systems can also provide clean drinking water.

Important to know:

Drinking water in Germany is of very high quality. The exact quality depends heavily on the respective location.

A high-quality whole house water filter not only protects against particles from the pipe network but also against bacteria, pesticides, medicinal residues, and other harmful substances.

Anyone who specifically wants to improve their drinking water quality – for example, in case of bad taste, unpleasant odor, or obvious discoloration of the water – is well advised to use a high-quality whole house water filter.

What Types of Whole House Water Filters Are There?

Water filters for the main connection differ depending on their design and function. The most common types include:

Replaceable Filters

Here, the filter cartridge is replaced regularly. They are usually cheaper to buy but incur ongoing costs for new cartridges.

Filters with Activated Carbon

These models additionally filter odor and taste substances from the water – ideal for problematic water quality.

Limescale Filters

These filters, also known as water softeners, remove limescale from the water or convert it so that it no longer deposits. In this way, limescale stains, deposits, and associated problems are reliably prevented.

Can a Whole House Water Filter Also Remove Limescale?

Calcareous water (hard water) can damage pipes and appliances in the long term. That's why many people ask: Are there water filters at the main connection that remove limescale?

The answer:

Classic whole house water filters do not remove hardness-forming substances like calcium or magnesium – they are not designed as limescale filters. If you want to prevent limescale deposits specifically, you need a special system. A particularly innovative solution here is the EVOdescale system from Evodrop: It works salt-free, uses an ion sieve in combination with a natural malic acid complex, and thus prevents the formation of limescale – completely without salt, electricity, or wastewater.

The result: Over 90% descaling rate, longer lifespan of pipes and household appliances, and less cleaning effort.

Tip: Check the water hardness in your region beforehand – starting from a hardness range of over 14 °dH, the use of the Evodrop descaler can be particularly worthwhile.

Which Water Filter is Right for My House?

The choice of the right whole house water filter depends on various factors:

Water hardness in your region: For very hard water, a model with additional limescale protection may be useful.
Size of the household: In single-family homes, a simple water filter is often sufficient; larger properties require more powerful systems.
Age of the pipes: In old buildings, a robust filter with high retention capacity is recommended.
Budget and maintenance effort: Water filters are cheaper to maintain in the long run, while replaceable filters have lower acquisition costs.

If in doubt, let our friendly service team advise you free of charge – we will provide competent and manufacturer-independent advice. Schedule your personal consultation appointment or simply call us.

How is a Whole House Water Filter Installed?

The whole house water filter is installed directly behind the water meter – usually by a specialist company. Installation usually takes no longer than 2-3 hours. It is important that the filter is easily accessible so that maintenance and cleaning can be carried out without problems.

Installation and Maintenance

The longevity of your water filter largely depends on professional installation and maintenance. Benefit from our friendly and reliable installation and maintenance service and ensure a long lifespan for your device.

Our Service Offer!

Replaceable filters require a new filter cartridge every 6 to 12 months, depending on the model and water quality. You can find the exact maintenance intervals in the manufacturer's specifications.

Frequently Asked Questions about Whole House Water Filters (FAQ)

No, it is not (yet) legally required – but DIN EN 806-2 explicitly recommends it.

Depending on the model, between 1200 and 3000. Backwash filters are more expensive to buy but cheaper to maintain.

It mechanically removes particles such as sand, rust, or limescale particles from tap water before it enters the household network.

Only with replaceable filters: about every 6–12 months, depending on manufacturer specifications and water quality.

Replaceable filters require a new filter cartridge every 6 to 12 months, depending on the model and water quality.

Good filters cost between 1200-3000 Euros.

Usually an installer – with simple models, the change can also be carried out by the homeowner.

The filter system itself often lasts several years. The filter cartridge (for replaceable filters) must be renewed regularly.

With a high-quality water filtration system, the pressure loss is barely noticeable (< 0.5 bar).

Find the Right Water Filter for Your Main Connection Now

Whether activated carbon filter or combination with pressure reducer – at Mein-Wasserfilter.com you will find high-quality whole house water filters at fair prices. Our experts will be happy to advise you on the selection. Order conveniently online now and protect your home from unwanted deposits and damage in the water pipes.

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Whole-house water filter

Table of Contents

What is a Whole House Water Filter?

How Does a Home Water Filtration System Work?

Why is a Water Filter at the Main Connection Useful?

Protection against Dirt and Corrosion

Longer Lifespan for Appliances and Fixtures

Recommendation according to DIN 1988

Health Reasons

Does a Water Filter at the Main Connection Also Provide Clean Drinking Water?

What Types of Whole House Water Filters Are There?

Replaceable Filters

Filters with Activated Carbon

Limescale Filters

Can a Whole House Water Filter Also Remove Limescale?

Which Water Filter is Right for My House?

How is a Whole House Water Filter Installed?

Installation and Maintenance

Frequently Asked Questions about Whole House Water Filters (FAQ)

Find the Right Water Filter for Your Main Connection Now