the table base? I'm not so sure I fully understand what you mean. The table has a 1" trim around it, the actual table where you sit stuff on is an inch below this trim. There is aluminum on this part, a whole drilled through that then another sheet of aluminum that sits on the 1" trim. This is caulked on (where you see the duct tape) and also has a hole through it. Through this piece I dropped in a 1 1/2" pvc with a flange on it that pulls the upper aluminum sheet down an inch in the middle creating a funnel. All this is now as one unit with the table, and water tight. Than I cut a piece of aluminum for the cage floor, cut same sized hole in the middle, the heavy schefflera in the center weighs it down and thats my drainage sysem as best as I can explain. I take pictures with my iphone but have to come here to my friends house to upload and post them onto the forum. So I hope this explanaition will suffice until I can get you those photos.