about disinfection of the pipes The disinfection unit can be combined with all Hydra-Jet massage systems that are equipped with dry run protection. The bathwater must remain in the bathtub after bathing. Then actuate the push-button to start the disinfection unit. The bathwater is cyclically pumped through the pipes along with the disinfectant for 30 minutes. The bathtub must then be filled with fresh water and started so that the pipes can be rinsed. If the Clean-Jet rinsing line is ordered as an accessory, then the final filling up of the bathtub with fresh water does not take place. This saves a great deal of time and water. This process should be repeated every 4-6 weeks. The disinfectant container fill quantity is approx. 2 litres. Important: Only use our special disinfectant.