I never thought about changing the entire pump!!! I change my impeller every spring just to be sure. You guys are scaring me talking about a warped housing. I thought that as long as the hoses are good and the impeller is changed once a year, I was fine. Any suggestions on often a brass pump housing should be changed? If you have a plastic housing, be sure not to over tighten those because they crack easily. Also, be sure careful not to reverse the hoses and make your pump blow instead of suck. Changing an impeller is not so bad. I always put dish washing soap on the impeller because that will make the rubber slide into the housing easier. Good Luck.
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