Tap water or demineralized water for IP testing?
For IP tests in accordance with DIN EN 60529 and ISO 20653, fresh water should be used in accordance with the standards. Laboratories often have water networks with demineralized water. This frequently raises the question of whether tap water or demineralized water should be used for IP tests. We recommend using normal municipal water with a water hardness of less than 6° dH (German hardness). In regions with high water hardness, this can be reduced by using a water softening system. However, water softening systems only reduce the lime content and leave other substances in the water.
Read our recommendation in the following report.
