I have a well with two well points. One well points is at 25ft and the other is at 28 ft. I use a one hp craftsman pump with a shallow well jet kit. The well was working fine this year and then all of the sudden the pump will not build pressure greater than 40 psi. I have replaced the tank with a new one without resolving the issue. I have to unplug the pump because it will not shut off. One other note, when I leave the pump alone the pressure stays at 40psi and then after a day I have no pressure in the system. I have check valves between the pump and the points as well as one between the check valve above the point and in front of the pump. I am not sure if it is well issue or a pump issue with a clogged jet.