PRESSURIZATION SYSTEM (P1A, P3, P1B, P2, P4) Design to feed water park at a constant flow (except for pump P4, ZD/465AU, managed by a VFD). Each system includes a UV sterilization and an additional chlorination and pH adjustment (pH-) dosing unit complete with of water flow indicator and analyzer / controller. Cartridge filters are foreseen to remove all particles bigger than 20µ before UV sterilizers.A dual pens chart recorder is used to log continuously pH and chlorine values. Each system will be stop in case water chemical parameters or UV efficiency are below required values.At the end of daily service, all the system is automatically shock-treated with more 10 ppm of chlorine for one hour.