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Ensure one-way directional flow in vacuum lines with these polyethylene plastic check valves. <ul style="margin-top:0px; padding-top: 5px; padding-bottom: 5px;"><li>Operate positively; instantly blocks flow if direction changes</li><li>Built-in arrows indicate direction of free flow</li><li>Neoprene disk, no metal</li><li>Maximum operating pressure is 20psi</li></ul>

SP Bel-Art Check Valves, &sup3;&frasl;&#8323;&#8322;&quot; Bore, &#8309;&frasl;&#8321;&#8326; to 1/4&quot; Taper, LDPE 12Pk

sp-check-valves-3-32-bore-5-16-to-1-4-taper-ldpe-12pk

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SP Bel-Art Check Valves, ³⁄₃₂" Bore, ⁵⁄₁₆ to 1/4" Taper, LDPE 12Pk