wunkie

Hi, I have 2 lines in my skimmer under the basket. Could one of those be for the waterfall? I turned the watertfall pump on today and it is just a dribble. It's clean, no debris in basket or motor. The skimmer basket is in place and as far as I now nothing could have gotten in either of the lines because the basket is wedged (not on purpose) in place. If one of those lines does go to the waterfall, how do I check to see if something did get in there? Can I run a drain snake in there or will it get stuck? This is not been a good pool summer. I replaced the waterfall pump, sweeper, and filter, and capacitor on the main pool pump all within the last 3 months. So this new problem is probably something easy but I am so frustrated I can't see it. Thanks for any help.