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Your Speedair compressor's Grainger part number does not come up in parts searches, are you sure it is correct. What Valve is this? The inlet valve into the tank from the pump? If that is the case, Grainger has different size compressor check valves in their catalog, which could be used to replace this one. These are compressor-in-tank-check-valves which have a relief port that connects to the pressure switch. They are found on page 1049 of the current catalog. The two linked to below are both 1/2 inch pipe thread where they screw into the tank and one is 2/8 FIP inlet and one is 1/2 FIP inlet, the other two are 1/2 and 3/4 compression tube inlet and 1/2 male iron pipe outlet (these are most likely what you need) Link I hope this will help you. Double check your compressor part number, as you may have copied it incorrectly. Charles 3/8 FIP inlet, 1/2 MIP outlet Link ***** 1/2 FIP inlet, 1/2 MIP outlet Link ***** 1/2 compression inlet, 1/2 MIP outlet Link ***** 3/4 compression inlet, 1/2 MIP outlet Link ***** You will have to copy these links and past them in your address line of your browser, being sure to not copy any leading or trailing blank spaces
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