Tracing the source of noise in a water-pump system

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Q We'd like to reduce the noise level on a submersible water-pump system. The tank is in the cellar some 60 feet from the well and connected by plastic pipe. The well driller and a pump representative both claim the hum and vibration are normal. Corrections by a builder have not reduced the noise. Any ideas? Otto Schulze Cutchogue, N.Y.

A. The well driller, the pump company representative, and the builder have already given their opinions or made mechanical modifications. A fourth opinion from here -- more than 2,000 miles away -- may not be pertinent, but here goes:

To trace the source of the noise, disconnect the pump from the water-pipe system. Then pump through an open discharge. If the vibration and noise are audible, then the problem may be at the pump -- bearings, loose connections, etc.

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If there is no noise or hum during the open discharge of water, then the noise could be in the plumbing. Moving the pressure tank from the cellar to the well may isolate the noise from the house by virtue of distance.

The winter weather in New York State will require an enclosure or other means at the well to prevent freezing.

If the water appears aerated when the pump first goes on, consider a hydraulic tank to bleed off the air.

Before accepting any previous opinions as final, or moving the tank to the well, consult a mechanical engineer who is experienced in this type of private water system. He may agree with all or one of us.

I hope he can quickly spot the trouble and correct it.

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