Should there be a germicidal lamp after the water softener?

Bakterie w wodzie

Many home owners wonder whether a germicidal lamp should be installed after the water softener. This question is quite popular, especially among people who are particularly sensitive to health and hygiene issues. The answer to this question, however, is not as simple and clear as it may seem.

What does a water softener do?

A water softener is a device used to reduce water hardness, which is mainly caused by the presence of calcium and magnesium ions. Hard water can lead to many problems, such as scale deposits in pipes, sanitary fittings and heating elements, which in turn can result in lower efficiency of heating systems and higher energy consumption. A water softener works by passing water through a bed of ion exchange resin, which converts calcium and magnesium ions into sodium ions.

In practice, this means not only a longer life of home appliances that use water, such as washing machines or dishwashers, but also noticeable benefits for users. For example, softened water makes detergents and soaps more effective, allowing them to be used less. Additionally, soft water is better for the skin and hair, which may be noticeable during your daily shower or bath.

However, it cannot be ignored that the water softening process also involves certain challenges and environmental burdens. Table salt is used to regenerate the resin bed, which generates brine rejects that end up in the sewage system. Therefore, although water softeners bring a number of benefits, their use also requires a responsible approach and consideration of the overall impact on the environment and the water system in your home.

In short, a water softener is an extremely useful device that aims to improve the quality of water in households or industrial installations. But like any technology, it has its pros and cons that are worth considering before deciding to install it.

When do you need a germicidal lamp?

The decision to install a germicidal lamp often depends on several criteria. First of all, if water supply tests show that there are bacteria or other microorganisms in your water, installing a UV lamp becomes a necessity. Even if the water is within the standards, but you use your own water supply such as a well, it is good to be sure that the water is free from bacteria.

It is also worth noting that germicidal lamps are commonly used in places with a high standard of hygiene, such as hospitals or laboratories. Therefore, if water in your household is used for medical purposes, for infants, or by people with weakened immunity, the use of a UV lamp may be an additional protection.

Additionally, germicidal lamps are also used in aquarium systems, swimming pools, and in the food industry, where maintaining high water quality is crucial. So if you run a business that requires additional protection against bacteria, installing a UV lamp may be a key element of your water system.

Finally, if you notice that the water in your home has an unpleasant odor, taste, or has changed color, it may be a sign that the water is contaminated. In such a case, the use of a germicidal lamp may be one of the stages of the water purification process.

Therefore, the decision to install a germicidal lamp is not clear and depends on many factors, including water quality, its use and individual needs and preferences.

Location of the UV lamp

If you decide to install a UV lamp for water disinfection, the location of this device in the water system is crucial. In most cases, the UV lamp is mounted directly behind the water softener. This is recommended for several reasons. First, a water softener removes the hardness of the water, which optimizes the performance of the UV lamp, as hard water can reduce the effectiveness of UV rays. Secondly, by installing a UV lamp behind the softener, you ensure that the water passing through the lamp is already free of potential contaminants that could hinder the penetration of UV rays.

In addition, it is worth paying attention to the availability and ease of servicing of the UV lamp. This device should be installed in a place that is easily accessible both for inspection and for possible bulb replacement or cleaning. Some UV systems are equipped with sensors and alarms that inform about the need for service or replacement of elements, which is an additional advantage for the user.

Ultimately, the location of the UV lamp in the water system is as important as its selection. Therefore, it is recommended to consult with water treatment experts to ensure the most effective and safe installation.


Installing a germicidal lamp in the water system is not directly related to the presence of a water softener. This is a matter of protection against bacteria and other microorganisms that may occur in the water. If you want to protect your water system from such threats, installing a germicidal lamp just behind the water softener can be a good practice.

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