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What has to be observed when refilling the whirlpool tub?

IMPORTANT: The whirlpool tub may only be filled with soft water if a suitable mineral additive is immediately added. If your water is extremely hard, then the water should be diluted by mixing it with water that has been treated with a water softener or by adding a special water softener. Your authorised Villeroy & Boch specialist dealer will gladly provide further information.

Step 1: For initial protection against stains and limescale residues, add the prescribed amount of stain and limescale inhibitor on filling the whirlpool tub. When the whirlpool tub has been filled, add the prescribed amount of water clearer, which will remove any micro particles contained in the fresh water.

Step 2: If possible, let your authorised Villeroy & Boch specialist dealer test the calcium hardness (CH) of the whirlpool tub water. Then adjust the CH to 150 to 200 ppm (parts per million, i.e. 10−6).

Step 3: Test the total alkalinity (TA) and adjust it accordingly. The TA should lie in the range of 125 to 150 ppm.

Step 4: Test the pH value of the water and adjust it accordingly. The pH value should lie between 7.4 and 7.6.

Step 5: Shock the whirlpool tub water after it has circulated for an hour. To do so, add 2 teaspoons (10cc) of granular chlorine (only use dichlorine) or 4 teaspoons (20cc) of granular bromine per 909,2 litres [uneven number due to conversion from gallons, T.N.]. (For detailed information, please refer to the "Shock treatment" section). Check the disinfectant levels in the water after a few hours and adjust them, if necessary, as follows:

Without ozone

With ozone


3.0 - 5.0 PPM*

2.0 - 4.0 PPM


6.7 - 11.0 PPM

5.7 – 10.0 PPM

*PPM = parts per million, i.e. 10−6

IMPORTANT: Only use the whirlpool tub when the amount of disinfectants lies in the range specified above. NOTE: If the level of disinfectants is too high, simply wait, as the amount of disinfectant in the water will automatically drop as time goes by.

Step 6: The initial chemical water treatment has now been completed. However, it can take a few days before the filters have completely cleared the water.