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Parker C Series Stainless Steel 316 Check Valve, 10 psi Cracking Pressure, 1/8" NPT Female: Industrial Check Valves: Amazon.com: Industrial & Scientific
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Nylon Bodied Check Valve, Fluorosilicone Diaphragm, 6.4mm (1/4") ID Tube, Cracking Pressure ≤ 0.1 psi | EOXShop
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