Life expectancy of well pumps?

[David A. Andersen]

So David you mandate a change of the pump if it reaches a certain age even if it seems to be working correctly?

Hell no I don't !!!

If there isn't and indication of defect, it can be 100 years old for all I care! I don't know how long it's been in service. How it's been used etc.

As Joe F (the well man) said "directly related to the number of cycles per hour the pump facilitates".