have hem pull up that parts page in the computer, it wont be in the diagram and may not even have a description but if you start at the beginning of the listing and read through in order following the parts from the front of the vehicle towards the rear it will be in the right place in the lineup. it only cost a few dollars it is actually more than just a coupler it is a check valve. i wish i had saved the stupid part bag to look it up. hope this helps

 

So it is the check valve? I was looking at the parts page with him, but like you say, there was no picture, and he already ordered the wrong part twice.

 

yes it is definitely the check valve. my 04 tj had it broken off in the top and i got the new one used some needle nose pliers to turn it the half turn or whatever and wiggled it out. popped the hose off that is inside the top popped the new 1 in making sure to put it the correct direction and then popped on th feed that is in the corner of the tub and good as new.

 

awesome, thanks a bunch man!!