IMPROVES CLEANER PERFORMANCE: Automatically controls excess flow through cleaner for improved performance and increased longevity IN GROUND POOLS: Energy efficient valve is for in ground pools only EASY SETUP: Quick, easy installation process FOR ZODIAC MX ROBOT CLEANERS: Compatible with Zodiac MX series pool cleaners International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.