Water pump won't maintain pressure

[bgrantalasykes]

Hello, we have a pompco piston pump, pressure switch is set to 50/ 30. The pump runs until it achieves 50 psi and then drops to about 35, so the pump is running VERY often, in a 10 minute shower probably 40 times, compared to maybe twice. There are no major leaks, and it doesn't look like it's lost prime.
How can we trouble shoot, is this a pump problem? Pressure switch problem? or maybe from the pressure tank?

Thanks in advance

 

[LLigetfa]

If the pressure only drops quickly when water is being used, then the tank is probably waterlogged. If it also drops when water is not being used, then the footvalve failed.