Aftermarket Check Valve for Ingersoll Rand - 5/8" Female NPT Inverted Flare x 3/4" Male NPT Outlet. Air compressor inverted flare fitting check valve for Ingersoll Rand & other compressors. This check valve has a 5/8" Female NPT inverted flare inlet as well as a 3/4" Male NPT outlet that screws into the air tank. On the side of the valve there is a 1/4" Female NPT port for a pressure relief valve. On the other side there is a 1/8" Female inverted flare fitting for hooking up your Ingersoll Rand unloader line. You can see all of these ports in the photos above. This is a high quality check valve that is made right here in the U.S.A.!.
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