Sure Flow Auto Anti-Siphon Valve, 3/4-In. Boss Just mix the powder with

Just mix the powder with liquid together in a clean container

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Sure Flow Auto Anti-Siphon Valve, 3/4-In. Boss Just mix the powder withSure Flow Automatic 3 4" Anti Siphon Valve. Professional Grade Anti Siphon Valve with Flow Control. Its unique reverse flow design helps prevent flooding in the event of internal diaphragm failure, keeping the valve closed and saving water. Anti Siphon valves should always be installed at least 6 inches above the highest head on the valve line, and should never have another valve installed further down the line from the main valve. After installation