One of the most important principles for drinking water hygiene is that water must flow. Standing water is one of the main causes for the growth of microorganisms and thus for increasing contamination. One problem, for example, is the supply of rarely used taps, such as guest toilets. Bypass pipes that are only in operation every few weeks or months – for example during maintenance work – are also ideal breeding grounds for germs and should therefore be avoided. If devices are used for water treatment, the use of a bypass valve is recommended. With the JUDO QUICKSET-X we offer such a valve – with it JUDO devices such as softening units can be easily dismantled without having to interrupt the water supply.
The use of a protective filter is mandatory anyway. A well-maintained filter also performs important services when it comes to hygiene: It keeps rust, dirt and sand particles away from the installation and thus removes nutrients and colonisation surfaces from micro-organisms. It also prevents particle-induced corrosion, which is also a breeding ground for bacteria.
For this reason it is also important to avoid lime deposits: Lime layers with their fissured surface also favour the growth of bacteria. This is where a softening unit or a system for alternative limescale protection can be of great help.
Surface corrosion or limescale deposits can also be avoided by dosing mineral solutions.
Another important component for drinking water hygiene is the separation of the heating circuit and the drinking water network, as regulated by EN 1717. So-called system separators are used to protect the drinking water, as in the JUDO HEIFI-FÜL PLUS filling valve.
In addition to these preventive measures, it may be necessary to renovate a drinking water installation in accordance with german DVGW worksheet W 291 with a one-off disinfection measure, for example by using chlorine dioxide with the JUDO MECHADOS mechanical metering pump system.
Until an installation has been refurbished from a structural engineering point of view, temporary disinfection of the drinking water according to DVGW Code of Practice W 557 can also be helpful. For example with chlorine dioxide and the JUDO WADOS-HC dosing pump system. Or, for larger buildings, with the chlorine dioxide generation and dosing system JUDO JCED.
Above all, landlords or other persons who supply drinking water to third parties as so-called contractors or other owners must observe numerous regulations. These refer, for example, to the so-called intended operation, microbiological tests (legionella) and maintenance. Particularly in view of the threatening consequences of contamination, it is highly recommended to seek specialist advice from experienced experts. Our consultants will be pleased to help you.