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|  In need of some check valves for 1/2" ID hose - GVRD or Online Any idea where to get a couple of these, either locally, or online ? They must fit 1/2" ID vinyl hose ... Not looking for 1/2" check valves for PVC  I'd like to install them on my GFO and Carbon reactors to stop product from back-siphoning into my sump when the pumps are turned off Thanks for your help  |