Have a bunch of these but cannot seem to get them to work.Maybe I am doing something wrong.With the connector in my hand and no fuel line hooked to it should I be able to blow thru where the hose hooks on? I have changed o-rings on all of these and some I can blow thru both and others just the air valve.Have been soaking connectors thinking maybe valves or springs are stuck.Iread a while back that you can put two o rings in but do not have the proper tool to take them apart.Any help would be greatly appreciated…..Thanks for your time…Russ…
Unless you can blow a lot harder than me, then no, you should not be able to blow through. Possibly some crud keeping things from seating, or the wrong O-Rings.