Dehumidifier waterworks water supply

Waterworks and water supply –
definition and description

Waterworks serve to treat and distribute drinking water. High-quality, technical equipment is required to provide pure water – it has to comply with the strictest food laws. 

The technical devices include pumps, filters, water storage tanks, switch rooms and fittings. 

Reservoir and dam

By the cool surface temperature of the lines and by the large difference to the ambient temperature is the formation of condensation, which colloquially often condensation or condensation is called, extremely favored in waterworks. This can be a serious problem for sensitive, technical equipment.

Water pipes in the waterworks

How does condensation form in lock chambers, elevated tanks, on pipes and lines?

In order to maintain the hygienic conditions, condensation must be prevented – or at least reduced. A film of water, i.e. condensation water, is always a source of colonization for microorganisms. 

The problem must not only be solved “cosmetically”, but SUSTAINABLY . In order not only to combat symptoms, the cause must be investigated in detail.

The temperature of the water in pumping stations and elevated tanks is usually between 5 and 12 ° C. That means – the lines and pipes are also about the same cold. If moisture-saturated, warmer ambient air meets the cold pipes, this leads to the precipitation of condensation water. 

Condensation water is created by moist air that settles on cooler surfaces, visible in droplets.

Condensation in the waterworks – problems and consequences

Difficulties caused by condensation in waterworks can manifest themselves in a wide variety of ways. The most common problems related to this include:

  • Malfunctions and subsequent failures of the electrical systems
  • Corrosion and moisture damage to the building
  • Increased risk of accidents due to damp and wet operating areas
  • Peeling of protective coatings
  • Impairment of hygiene by algae, microorganisms, mold, fungi and bacteria
  • Damage from rust on machines and pipes
Faucet grate

If important electrical systems are damaged by the condensation, this can lead to malfunctions and in the worst case to failures. That means: expensive and lengthy repairs.

In addition, corrosion damage and signs of wear and tear on technical components increase proportionally with the intensity of the condensation water. The result is increased maintenance costs.

What measures can be taken to save costs and prevent the consequences of condensation water?

Dehumidifiers for water supply systems – effectively preventing condensation in the elevated tank and pumping station

Gate valve

The best weapon against condensation is a dehumidifier with intelligent output control. This results in temperature-adjusted dehumidification. Efficient and energy saving. Can be used from + 2 ° C. In order to prevent the formation of condensation, the humidity must be regulated at a constant level. 

The following applies: The lower the temperature in the room – the more power the dehumidifier must have in order to prevent the formation of condensation.

Condensation dehumidifier or adsorption dryer?

A basic distinction is made between condensation and adsorption dryers. 

Clean water from the waterworks pipeline

For decades, adsorption dryers were the dominant dehumidifiers in waterworks. Why?

Because there were no condensation dryers that would have worked efficiently at low temperatures. With the new technology of the iECO dehumidifiers , however, dehumidifiers are now available that require up to 70% less electricity than adsorption dryers – and can be used efficiently from + 2 ° C. 

In other words, a temperature range that is given as a minimum temperature in every area of ​​the water supply.

Dehumidifiers are available in mobile and stationary versions. For temporary use, mobile dehumidifiers are a good choice because they can be transported and put into operation relatively easily. Stationary dehumidifiers are ideal for long periods of operation in the same room.

The performance of the devices must be matched to the volume of the room in order to achieve optimal results with the lowest possible energy consumption. In addition, air circulation plays a particularly important role in tall, spacious structures . 

Without this, condensation can occasionally form due to the formation of temperature layers and poor airflow, despite a powerful air dehumidifier.
For these areas, combinations of compact air dehumidifiers with “pack-on ventilation modules” have proven to be very effective.

What is the use of a dehumidifier in the water supply facility?

  • Operating costs are reduced
    Regularly removing rust and applying protective coatings takes time and is expensive. Malfunctions and extra-daily maintenance measures are reduced.
  • Less repair work and longer service life of the system
    The constant air humidity and the prevention of condensation reduces wear on machines and devices.
  • Improvement of operational hygiene
    By lowering the air humidity, mold and bacteria are deprived of their breeding ground and operational hygiene is increased.

Facts About Mold! Mold formation and growth factors.

schimmel sofa
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Mold spores are practically everywhere

Mold spores are tolerated with the air. 

However, they can only grow where there is a suitable breeding ground, such as on damp surfaces.


  1. Mold spores are practically everywhere
  2. Growth factors for mold
Window condens

Mold growth  is therefore always due to moisture and often develops in secret.

The air inside is usually warmer and therefore absorbs more water than the cold outside air.

If this air is not discharged sufficiently and in a suitable manner, it can condense in various places in the house.

These damp spots can be an ideal breeding ground for mold and bacteria.

The reason for an infestation can be the poor state of construction of the building, or simply the presence of people who breathe and exude sweat. Everyone gives off one to three liters of water through their skin within a day.

Cooking, showering or bathing also increases the “moisture production”, just like indoor plants.

Mold often forms when several people live in a confined space.

Hot air can store more moisture than cold air, which is why it is important in winter to heat enough so that the moisture does not settle on the cooled-down outer walls.

Thermal insulation is often poor, especially in old buildings. 

However, this has little effect on rainwater that collects in walls with a damaged external facade. Rain is often the cause of damp walls and mold.

In the case of leaky old windows and newly insulated walls, on the other hand, air is constantly drawn through.

Such apartments, as a rule, avoid mushrooms.

On the other hand, in the event of water damage or a leaky shower tray, moisture can also collect in the masonry, so that the fungal spores find an ideal breeding ground.

Schimmel – Questions and Answers More information …

Growth factors for mold

From a humidity limit of 65% RH, molds settle. 

They also need nutrients and the right temperature, which is optimal for their growth in most residential buildings.

Mold growth along the baseboards

Survival is already assured on surfaces with a pH range of 3 to 9, the value at 5-7 being the most optimal. 

However, it can also happen that the spores settle on surfaces with much higher values, in which case a so-called biofilm of dust deposits has formed.