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Amazon.com: Megairon 1/2" NPT Female WOG1000 Check Valve,Spring Loaded In-line Low Cracking Pressure,Stainless Steel SS316 CF8M : 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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