CMP DEL 53000-025-000 Gen AOP™ 25 Sanitizer System 110/240V 25K gal is the most powerful residential pool advanced sanitizer. DEL AOP® is dramatically more powerful than chlorine and other sanitizers, and even more powerful than ozone alone. CMP has the only residential AOP ozone/UV systems classified by NSF as a supplemental sanitizer. Next Gen AOP® systems are not only powerful: they are designed for easy installation, simple service and smart feedback.