Tonka Water’s Pur-IX™ system is an ion exchange process that operates at maximum efficiency while producing minimum waste and salt usage. The system incorporates a series of ion exchange vessels, which are continuously treating water and regenerating vessels through a multi-port valve. This continuous process provides maximum resin loading but prevents nitrate dumping with its parallel vessel configuration. The multi-port valve has specially designed ports that eliminate pressure spikes so even during stage rotation, the feed or well pump will never see adverse pressure conditions. The treatment processes include nitrate removal from potable water, softening and other applications.