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Question:

Water pump make screech noise?

I just move to this house, it's been empty for a while. The water pump keep screeching everytime I turn it on. What can I do to get rid this noise?

Answer:

Is there water in the system? Pump bearing worn Find a bleed point on the pump and vent any air from it with the pump Off.
Check if your water pump has an oil port, and put some oilers. The other possibility is that the pump impeller is coming loose or warped and rubbing. That means the pump is going out and needs rebuild or replacement. That is worse case along with a failing motor bearing.
You must have a surface mounted well pump also called a jet pump or you wouldn't hear a noise from a submirsable which is at the bottom of the well. Check where the motor hooks onto the pump itself to see if there are any small oil fittings. I doubt that there are, but it can't hurt to look. If you find any use 3M or similar oil to lubricate the bearings. If the house has been vacant for awhile those bearings might be rusty from sitting, and may stop swealing on their own as you use the pump and the shaft/bearings may grind the surface rust off and stop the noise. If they don't you will have to call a service company to evaluate the problem. Here is part of jet pump potential maintainence issues: Perform necessary pump maintenance: some water pumps require inspection and replacement of internal parts such as bearings or impellers as often as after just four or five years of use. While it may be possible to ignore this maintenance for a while, the effect may be to so wear the pump or pump motor parts that complete pump or pump motor replacement are necessary.

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