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4 Pcs Anti Siphon Valve, Hose Bib Vacuum Breaker Set 3/4 Inch GHT Hose Backflow Preventer for Garden Spigot RV Hose Connection with Sealing Tape and Washers : Amazon.co.uk: Garden
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SUNGATOR 2-Pack Vacuum Breaker Set, 3/4 Inch Anti-Siphon Hose Bib Valve for Garden Spigot, RV, Solid Brass Anti-Backflow Valve with Tape : Amazon.co.uk: DIY & Tools
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Outdoor spigot attachment that prevents water from flowing down to a hose. Hard to remove. What is it and what does it do? : r/whatisthisthing
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