yea. i have the top barb hooked in to a vac sorce and the bottom one is left open. my point was, i think someone ( the person i bought it from) put a way-to-small barb on it and its not getting enuf volume to open it all the way. um, ill have to look in to that..

 

yeah man the top barb is preatty big...

 

This one isnt seized