Plumbing system and method for purifying drinking water

A water installation system, comprising:

• an extraction point (38) and/or an outlet, the water installation system having a direction of flow (D) towards the extraction point and/or the outlet;
• and
• a chemical germ barrier (200) upstream of the extraction point and/or the outlet,
• wherein the chemical germ barrier (200) comprises a material that has an alkalinizing and/or oxidative effect,
• the material being at least one peroxide or being selected from the group consisting of combinations of peroxides with carbonates, oxides, silver, chlorine, ozone, and
• the material being provided in form of granules with particles having a particle size of greater than 20 micrometers up to less than 5 mm,
• the material being configured such that after a stagnation phase of 5 hours an OH-concentration in the chemical germ barrier (200) increases resulting in an increase of pH to a value of 10 up to 13.

A method for treating drinking water,

• wherein the drinking water is provided in a water source (30), the method comprising:
• a stagnation phase in which the drinking water does not emerge from the water source (30);
• and
• an extraction phase in which the drinking water is extracted and replenished from the water source (30),
• wherein, during the extraction phase, the drinking water passes through a chemical germ barrier (200), and
• wherein the chemical germ barrier (200) is provided during the stagnation phase in a flow path of the water by a material having an alkalinizing and/or oxidative effect, with the material enriching the water in the chemical germ barrier (200) during the stagnation phase with OH-ions and/or with hydrogen peroxide, such that during the stagnation phase the drinking water has a pH in the range of 9 up to 13 and/or a hydrogen peroxide concentration of 50 mg/L at the maximum.