I trust Keith's judgment but I still think there has got to be something else at work here. A pump can't fail because it's not strong enough ... if it's not strong enough to lift the water, you'll just have poor flow. However, if there is restriction on the intake side, then indeed, you are pushing the pump beyond it's limits and risking failure. In short, pumps push, they don't suck. Two pump failures in this short of timeframe may just be coincidence but it's now the point where I'm skeptical. If you have a third pump fail on you then I'll know it's not coincidence.
Who did the actual plumbing on your system, may I ask?
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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