I know absolutely nothing about plumbing, but may need to learn. My kitchen sink drain started leaking today. We have lived here for six months and not seen it before. From what I can tell (I'll try and explain, but pardon my ignorance) There is a piece of PVC under my sink drain. It has a small section that is angled up that comes off of the side, that I believe is there to hook a dishwasher drain hose up to. My dishwasher drain hose connects on the other side of the sink through the garbage disposal. If I run a lot of water through the drain it will start to back up and come out of the piece that could be connected to the dishwasher drain hose, but isn't. Do I need to cap this piece somehow, or is this a sign of a clog since it hasn't been a problem before? Any help would be greatly appreciated
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