Hey all, I just wanted to post something I noticed at Walmart today in case anyone is planning on purchasing an intex 18' x 48" ultra frame this season. There is a new version of this pool. 28239wl is the old version, and 28239wa is the new one. The new version has two return lines instead of just one! It comes with all the pipes and fittings to fit the single pump output to the two return holes in the liner, but if you're planning on doing any skimmers, fountains, or really anything else this will save money and time. In my local store they were the same price, and both models were mixed in together so you may have to look through.