Loud pumps are generally associated with bearing that are going out. If you don't think that could be the issue, debris caught in the impeller could be a possibility. Another would be what is called "Cavitation".
That's where the pump is trying to pull more water through it that the pipe diameter will allow for. This results from too small of a pipe diameter on the suction side line, too long of a run, or too many 90 degree elbows. Unfortunately it is not that uncommon.
To check for cavitation you need to restrict flow back to the pool by valving down (constricting flow) if possible. A good pool tech will be able to tell just by listening. When you restrict flow you should notice a distinct quieting of the pump. Hope this helps.
I forgot to mention if it is cavitation, the fix is to either put a restrictor valve in the return line, or down size the impeller (and motor to save electricity)I forgot to mention if it is cavitation, the fix is to either put a restrictor valve in the return line, or down size the impeller (and motor to save electricity)
Answers & Comments
Loud pumps are generally associated with bearing that are going out. If you don't think that could be the issue, debris caught in the impeller could be a possibility. Another would be what is called "Cavitation".
That's where the pump is trying to pull more water through it that the pipe diameter will allow for. This results from too small of a pipe diameter on the suction side line, too long of a run, or too many 90 degree elbows. Unfortunately it is not that uncommon.
To check for cavitation you need to restrict flow back to the pool by valving down (constricting flow) if possible. A good pool tech will be able to tell just by listening. When you restrict flow you should notice a distinct quieting of the pump. Hope this helps.
I forgot to mention if it is cavitation, the fix is to either put a restrictor valve in the return line, or down size the impeller (and motor to save electricity)