1 in. FPT Anti-Siphon ValveCompatible with most industry standard 24 Volt sprinkler systems 1 in. inlet size Heavy duty plastic construction resists corrosion for durability Checks back flush and helps keep contaminants out of the water supply Flow control adjustment helps minimize sprinkler fogging and over spray Internal bleed lever is great for testing and flushing the sprinkler lines UV resistant Manual on off function For outdoor use only For irrigation applications only