The INTEX Krystal Clear filter pump 637 is a high-performance pump for keeping your pool water clean. - Brand: INTEX - Model: Krystal Clear Filter Pump 637 Thank you for looking. This came with the pool I purchased, but it has never been used and has been stored in a warehouse. I have confirmed that it powers on and that water flows through it, but I have not tested its full functionality. The original box was in poor condition, so I will arrange for shipping in a different box.