Patent ID: 7883622

Claim:
A system for treating water in a swimming pool, spa, or whirlpool bath, said system comprising: a main water circulation loop, a primary bypass loop connected to said main water circulation loop, a Venturi injector in said primary bypass loop, a source of ozone connected to said Venturi injector, a sensing mechanism for sensing at least a need for adding a halogen sanitizer to said water and providing an indication representative of said need to add said halogen sanitizer to said water, a halogen sanitizer flow for selectively providing said halogen sanitizer to said primary bypass loop, said halogen sanitizer flow further comprising: a first flow path including an electrolysis cell, a second flow path comprising a supply of halogen salt, a valve coupled to receive said flow of water, and connected to switch said flow of water between said first flow path and a flow path comprising said first flow path and said second flow path responsive to said indication of said need for adding said halogen sanitizer.