Memmert HCP 50, HCP 150, HCP 105 Data Sheet

Information concerning water to be used

with INC, HCP, HPP, CTC and ICH units

Using tap water: The point every user should pay attention to, when using tap water, is the
amount of chlorine and calcium carbonate in the water. Chlorine becomes extremely
aggressive under certain conditions, and creates rust very quickly, even on stainless steel
components. Calcium carbonate and other dissolved solids can create accumulations inside
the steam generator, and consequently, destroy the unit. Thus, it is not recommended to use
tap water with these devices.

Using demineralized (or de-ionized) water: This is water, which is cleaned by the use of an
ion exchanger. This method removes minerals (e.g. lime) from the water, but it still contains
chlorine. Besides that, demineralized water fosters the growth of algae (plants) in the water
canister. Therefore, demineralized water is not recommended.

Using distilled water: Distilled water is much cleaner than demineralized water, but it requires
much more effort to produce it. Distilled water is practically free from salts, organic
compounds, and microorganisms. Since chlorine is a salt, most of the chlorine will be
removed in the distillation process, and bacteria/organic compounds, etc., are largely
removed as well, so the growth of plants is much less likely, as well as deposit of residua
inside the steam generator. Therefore, distilled water is our recommendation for devices with
steam generator.

Distilled water, used in devices with steam generator, should fulfill VDE 0510 / DIN EN
50272, and need to have a conductivity of maximal 10µS/cm as well a pH-value
between 5.0 – 7.0.