E Series offers an incomparable and safer pool experience for your family and friend. Silky, smooth, odorless and salt free. The water circulates through our Delta UV sanitizer that uses the type C ultraviolet rays to completely purify water deactivating all the dangerous micro-organisms resulting in the cleanest and purest water possible for your pool. As small residual of chemicals are used in order to destroy any micro-organism that do not find their way into the UV sanitizer