I just got my pool installed last week and have just gotten the electrical done. I ran the pump last night for about 90 minutes. I shut it off briefly and then turned it back on and the pump split in two right after the valve that switches from filter to waste. There is a housing there that only seems to have a small tongue and groove clip that holds it together. My pool guy just happened to be in town and stopped by...He said that after 19 years of selling and installing pools, he never saw such a thing. The only thing that I can think of is that the pump itself was installed and not lined up properly. The moter part or back of the pump is screwed down to the base of the pump and the front of the pump where the inlet is is not. It seems like there may be a slight misalignment due to the plumbing being to long inbetween the pump and the filter. Could this have caused the shaft to be torqued a little and cause it to disengage from the impeller? Any help on this matter would be appreciated. Thanks