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Zurn Wilkins 1-350 1" 350 Double Check Backflow Preventer: Household Rough Plumbing Valves: Amazon.com: Industrial & Scientific
Apollo Valves on X: "Our new Double Check Valve Y-Pattern Assembly is now available! Typical applications include irrigation (particularly in-ground meter box installations), auxiliary water storage (such as pools or storage tanks),
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Watts 3/4 in. Bronze FPT x FPT Double Check Valve Assembly Backflow Preventer 007M3QT - The Home Depot
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Wilkins 2 in. Double Check Valve Backflow Preventer 2-950XLT2FT - The Home Depot
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Zurn Wilkins 112-350 1-1/2" 350 Double Check Backflow Preventer, Non-Potable: Industrial Valves: Amazon.com: Industrial & Scientific
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