Ensure a continuous supply of safe and clean water in the property

Residents of apartment buildings depend on a good and stable water supply. Guldager has supplied corrosion protection and water treatment to countless properties for more than 70 years. We therefore know the challenges in residential properties and have made it our specialty to deliver complete solutions where we consider the entire water installation. We call it intelligent water treatment.

This means we supply corrosion protection, softened water, and bacterial prevention to a large number of our customers. However, we do not only supply the systems to solve these issues; we also ensure they operate around the clock.

With Guldager Intelligent water treatment also means efficient service. And our comprehensive service program gives you the opportunity to enter into a service agreement that fits your needs exactly.

With a complete solution from Guldager , including an ongoing service agreement, we can ensure that your water installation is in operation 24/7 and delivers healthy and clean water to residents.

Products and service go hand in hand – a 360-degree approach to properties

Everyone depends on a reliable and stable water supply. Especially in properties where individual residents have no influence on the supply, people rely on and trust that property management has everything under control.

For several generations, Guldager A/S has delivered water treatment and corrosion protection to thousands of properties.

Corrosion protection, softened water, and bacterial prevention/control are among our core competencies. Delivering not only the systems, but also commissioning and service agreements, is part of our 360-degree concept.

Contact a consultant

Call +45 48 13 44 00 to learn how we can assist you.

Erik Clausen
Erik Clausen

Area Sales Manager Funen & Jutland

+45 2268 4123

ec@guldager.com

Per Kaarup
Per Kaarup

Area Sales Manager Zealand

+45 2268 4131

pka@ guldager .com

remove-limescale-from-water

CASE: Investment paid off in under a year

Limescale in domestic hot water caused major issues with poor heating economy and scaling in aerators and sanitary fixtures.

On a property in Copenhagen, Guldager installed a “UniSoft® Hydrus” softening system in the property’s heating plant to descale the hot water for more than 400 apartments. In addition to fewer problems with clogged aerators for the residents, the property achieved savings on district heating costs of more than 20%.

The savings were achieved through a significantly improved cooling of the district heating water, allowing the investment in the softening system to pay for itself in less than a year.

Are you experiencing any of these issues?

Corrosion of hot water pipes and hot water tanks?

The cause:

Corrosion in pipes/tanks

The solution:

Catalysis/Electrolysis

These products can solve it:

Unicat, Cathodic protection

Poor heat transfer from heat exchanger

The cause:

Scaled-up heat exchanger

The solution:

Acid cleaning of heat exchanger / prevention of scaling

These products can solve it:

Acid cleaning, CalcFree, UniSoft® 30-60-90, UniSoft® Hydrus

Limescale deposits in hot water pipes and hot water tanks

The cause:

Limescale in the water

The solution:

Softening of domestic hot water

These products can solve it:

UniSoft® 30-60-90 / UniSoft® Hydrus

Red water or slime in the water

The cause:

Corrosion, limescale, and bacteria

The solution:

Catalysis/electrolysis, softening, bacterial prevention

These products can solve it:

UniSoft® 30-60-90 / UniSoft® Hydrus, Unicat, UniControl, LegioControl®, Healthy Water Concept

Lack of hot water in certain rental units

The cause:

Poor circulation

The solution:

Valve regulation

These products can solve it:

Alpha-B valve

High maintenance costs due to pumps and valves

The cause:

Limescale in the water

The solution:

Water softening

These products can solve it:

UniSoft® 30-60-90, UniSoft® Hydrus

High return temperature costs

The cause:

Poor heat transfer caused by limescale

The solution:

Water softening

These products can solve it:

UniSoft® 30-60-90, UniSoft® Hydrus

Limescale deposits on sanitary fixtures and tiles

The cause:

Limescale in the water

The solution:

Water softening

These products can solve it:

UniSoft® 30-60-90, UniSoft® Hydrus

Scale-encrusted shower heads and aerators

The cause:

Limescale in the water

The solution:

Water softening

These products can solve it:

UniSoft® 30-60-90, UniSoft® Hydrus

Ill residents (suspected waterborne bacteria)

The cause:

Legionella bacteria in the water

The solution:

Bacterial prevention

These products can solve it:

LegioControl®, Tank disinfection, Healthy Water Concept

… then it is time to have the water quality in the property evaluated. Contact us or read more about our products below.

FAQ – find answers to the most frequently asked questions

Is corrosion protection necessary today?

Yes, although most modern installations are built using corrosion-resistant materials, it is still necessary to protect steel vessels, sand filters, etc. Furthermore, there are tens of thousands of older installations made of galvanized steel that can remain operational for many more years with active corrosion protection.

Once the hot water tank is removed, we surely no longer need corrosion protection?

Yes, remember that the piping system still requires protection against corrosion.

How can water softening improve system operation?

You prevent scale deposits on heating elements as well as in pumps and valves, thereby reducing maintenance expenditures.

Is it necessary to disinfect the vessel annually?

Yes, an annual cleaning of the vessel combined with chlorine dioxide disinfection is recommended as the most effective countermeasure against Legionella.

Does corrosion protection not remove limescale?

No, it solely prevents corrosion. However, limescale can be removed by installing a water softening system.

If you did not find the answer to your question, please call us at +45 48 13 44 00

Catalysis is Guldager's effective technology for corrosion protection in domestic hot water tanks and pipe installations.

Catalysis

Catalysis is Guldager's efficient technology for protecting against corrosion in hot water
tanks and pipe installations.

Read more
For installations featuring galvanized steel piping systems with heat exchangers or small vessels where cathodic protection cannot be installed.

Unicat®

For installations featuring galvanized steel piping systems with heat exchangers or small vessels where cathodic protection cannot be installed.

Read more
For iron tanks with a corrosion-resistant pipe system. Can be combined with Unicat® and UniControl.

Cathodic Protection

For iron tanks with a corrosion-resistant pipe system. Can be combined with Unicat® and UniControl.

Read more
chloriDOS® iOX® is a dosing system designed to control Legionella in water-borne systems.

chloriDOS® iOX®

chloriDOS® iOX® is a dosing system designed to control Legionella in water-borne systems.

Read more
Electrolysis-based disinfection system for continuous Legionella prevention in domestic hot water installations – utilizing only salt, water, and electricity.

Hyprolyser iSEC

Electrolysis-based disinfection system for continuous prevention of Legionella in domestic hot water systems – utilizing only salt, water, and electricity.

Read more
Dynamic control valve for domestic hot water, specifically designed for flow regulation.

Alpha-B

Dynamic control valve for domestic hot water, specifically designed for flow regulation.

Read more
Point-of-use filters attachable directly to shower heads, mixing faucets, or taps in the event of Legionella contamination.

Water filters for emergency Legionella mitigation

Point-of-use filters attachable directly to shower heads, mixing faucets, or taps in the event of Legionella contamination.

Read more
Drinking water-approved softening system for larger homes and smaller properties with up to 30 persons. 3.2–5.6 m³/h

softliQ:MD softening

Drinking water-approved softening system for larger homes and smaller properties with up to 30 persons. 3.2–5.6 m³/h

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A duplex system is the ideal choice when there is a need for a continuous supply of softened water in large volumes. 2–15 m³/h.

UniSoft® 9100

A duplex system is the ideal choice when there is a need for a continuous supply of softened water in large volumes. 2–15 m³/h.

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Volume-controlled softening system operating without electricity. 2.7–7.5 m3/h.

UniSoft® 20-21

Volume-controlled softening system operating without electricity. 2.7–7.5 m3/h.

Read more
Hot water boilers must be opened and cleaned annually to prevent bacterial growth.

Boiler cleaning

Hot water boilers must be opened and cleaned annually to prevent bacterial growth.

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Annual disinfection of the tank using chlorine dioxide removes biofilm and prevents bacterial growth.

Tank disinfection

Annual disinfection of the tank using chlorine dioxide removes biofilm and prevents bacterial growth.

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Risk assessment

Risk assessment

A risk assessment is a comprehensive, end-to-end technical review of the installation.

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Water analysis

Water analysis

We offer various types of water analyses based on different analytical methods.

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Pipe flushing

Pipe system flushing

An annual pipe flush effectively removes biofilm from distribution lines and risers.

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acid cleaning

Acid cleaning

Acid cleaning of tanks and heat exchangers for improved heat transfer.

Read more
Unifill Gold removes bad odors and undesirable tastes from the water, reduces any chlorine compounds, and filters down to 0.1 microns.

Unifill Gold

Unifill Gold removes bad odors and undesirable tastes from the water, reduces any chlorine compounds, and filters down to 0.1 microns.

Read more