Pre-Season Water Safety Procedures

All COLD WATER TANKS should be emptied, scrubbed with a brush, and their walls whitewashed with chlorinated water.

All HOT WATER TANKS (boilers) should have their interiors (inner surfaces) cleaned (removal of lime scale and sediment).

All FILTERS connected to the water system should be dismantled for detailed cleaning and disinfection.

All SHOWER HEADS, shower hoses, faucet aerators, and garden irrigation sprinklers should be dismantled for detailed cleaning and disinfection.

All COOLING TOWERS should undergo detailed cleaning and disinfection.

All pool BALANCE TANKS and FILTER SANDS should be thoroughly cleaned and disinfected.

Perform CHLORINE SHOCK TREATMENT by adding chlorine to cold water tanks. The target free chlorine concentration is 3 ppm, with a 24-hour retention time within the system.

Increase the water temperature inside boilers to 70 ºC, and run hot water from all showers and faucets (bath, hairdresser, etc.) at a pencil-thickness flow for 5 minutes each. This is called THERMAL SHOCK TREATMENT.

Raise the water temperature inside boilers to 70 ºC, measure the temperature at the bottom drain valve, and record it.

Record Keeping

Document all performed procedures on appropriate forms, take photographs, or prepare reports and have them signed.

Important

To reduce the risk of Legionnaires' disease, be sure to perform the above-mentioned procedures before the season starts.

Note: The required procedures may be more extensive than those listed above. The important ones are mentioned as reminders, and the priority may vary depending on the risk situation.