Call Pyramid Air. When I bought my AV compressor it had a female quick disconnect fitting in the bag of parts. My FX connector was an exact fit and screwed into it. Then I just clicked that into the the end of the hose and it works perfectly. Either in the bag or on the FX connector itself, there was a sturdy rubber/metal gasket that is used when screwing the FX part into the AV fitting. Hope this helps!