<a href=showthread.php?s=&postid=13060025#post13060025 target=_blank>Originally posted</a> by rvitko
A nipple from the airline plugs into this, it should fit firmly, so much so that you can lift the pump by the hose. If it comes out easily the nozzle is defective. Be sure that the airline is not pinched, their is a hook in the skimmer body that retains the hose, if the hose is pinched between the pump and the body that can also be a culprit.