I just replaced the bladder tank in my aunt's home.... It is being used with a 1/2hp shallow well jet pump which is drawing from a spring.....The tank pressure is correctly set at 28psi (2 less than the 30/50 limit on the switch) The problem is that the pump will not stop rapidly cycling..... There seems to be lots of pressure building in the tank, but as soon as the guage reaches the cutoff pressure, the switch tries to cut out, then just continues to cycle....Every so often it will just work properly, but only for 2 to 3 normal cycles, then it just starts cycling rapidly again.... I've tried everything I could find in these forums to rectify the problem, but to no avail.....Any help would be greatly appreciated.