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Great, when it finally goes I'll know enough to avoid the brand. Thanks.

So here's an update I went ahead and swapped the fixed PVC piping with flexible hoses and the noise and vibration is gone. Didn't expect that would be the solution to the noise but we wont look a gift horse...

It's more than whistling though, it's vibrating and the humming/thrumming is quite loud, I can hear it from the second floor. If it is a check valve, is that usually repairable or should I call it a day on this pump. Lastly, your note that perhaps this set up should not have lasted 2 years, is...

Here’s the short story. http://www.plumbingforums.com/forum/images/smilies/smile.gifI have a 1.5 hp Nocchi jet pump on top of a 20 gallon galvanized iron pressure tank (no bladder or diaphragm). Pressure switch is set to cut in at 20psi and cut out at 40 psi. The set up has been working well for...