I recently replaced my shallow well pump (1/2 horse) because when I attempted to change the pressure guage, which had not been reading anything for quite some time, the stem broke off due to corrosion. Before I changed the pump I was having a problem with the pump fast cycling after water in the house was used.

The Tank that I am using with the pump was replaced approximately 2 years ago as the old one sprung a leak.

Now that i have replaced the pump, the pump fast cycles while drawing water, not after. It builds up pressure rapidly, shuts off, the pressure drops pretty quickly (about 5 to 10 seconds) and then the pump kicks in again.

Not being a plumber, i am not sure what to do? Could the tank be water logged? did I need to drain it first? any suggestions?