Is the performance of the Hydromx® water solution stable over time, or does the efficiency deteriorate? October 14, 2021 By Hydromx® has at least 15 years lifetime subject to compliance with the instructions of use, good maintenance of concentration levels of Hydromx®, and avoidances of abnormal use and/or alteration. It is recommended that you contact your installer for any necessary follow-up action after 8 years of use. Hydromx® operates correctly at concentrations between 45% – 60% so in many systems there is no need to top-up the concentration levels for many years after installation. However, we do recommend at least annual maintenance checks are carried out on the system. The Hydromx® and water solution can be tested to ensure it matches the concentration at the time of installation and any adjustments can be carried out. Additional, e.g. pH tests, and more regular checks may be required for some systems as recommended by your installer or heat engineer, for example with aluminium components.