Anti-siphon valves allow water to only flow in one direction. For irrigation purposes, it prevents water from the system from being siphoned back into the
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In built-in lawn sprinkling systems, there is a device called an
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Can I siphon the water out of the bilge on my boat using just a
How to Use Anti-Siphon Valves (w Backflow Prevention Basics)
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How does an anti-siphon valve work? - Quora
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