Prior to recent changes in the guidelines on health and safety covering Legionella prevention, it was recommended that the tests be conducted in the form of a risk assessment of Legionella every two years or as a result of system modifications.

3 Field Testing, Maintenance or VPL Replacement Requirements This standard requires that VPLs be tested in the field at intervals not exceeding 12 months.

Owners of a property are recommended every 10 years. If the property has a swimming pool, it must be tested once a year.

Adjust the setting of the rinsing aid according to your preferences of the drying result. You must reload the rinsing aid regularly (about every 4 weeks), and certainly if the indicator of the rinsing agent mentioned above shows that it needs to be refilled.

Although the active substance should be replaced every 45 days, depending on its moisture levels, the container will probably last several years.