Both a new Intex Kristal Clear 635T Pump last summer. I had to also buy all the adapter part hose parts so that it would fit the Intex Pool. The pump was used for 3 months and taken down for the winter and now it does not work. Took the pump apart and found a flimsy little ceramic "stick" for the impeller was broken. I cannot locate another one anyway. They should be a part that can be purchased from Intex but they are not. Most likely a $1 part but they do not want you to buy the impeller shaft - they want you to buy a new pump/filter. What a scam - never again. There SHOULD be a class action suit against them. I have now gone through 3 pump/filters for my Intex pool. I bought the 635 model because it was bigger and pumped more gallons. So even though more expensive I purchased it. Big mistake - piece of crap. Anyone hears of a lawsuit against Intel for the pump - count me in!!