I have a permaline tank. The well is 440 ft. deep. The pump is set at about 400 ft. I think. The pump keeps jocying on and off. Like 40 to 60 psi in about two seconds. Any ideas? I here this is extremly hard on your pump. There is a sharder valve (?) in the line coming from the pump. I understand It's suposed to suck air in but it squirts water out. Thanks in advance.