The PDC EverPure™ ozone system produces pure ozone, nature’s powerful oxidizer continuously destroying organic and inorganic contaminants instantly. The EverPure™ system is cleansing your hot tub water whenever the pump is filtering, is completely silent and costs pennies a day to operate! Your hot tub water is scrubbed clean by the filtration system, combined with EverPure™ ozone and returned pure, clean and crystal clear through the ozone jets. Standard on all hot tub models.