We had our new well drilled. Since we are trying to save money, they just drilled the well and we will install everything like aerator, pressure tank and well pump. Now, everything was plumbed and installed. The very first time we tried, the well pump wont shut off and when it reached 50 psi it would go back to 0 and keep cycling again to reach 50 and 0 again and never shut off. What do you think is the problem? Thanks. I appreciate it.