The most common symptom of trouble in any water well is a decrease in the water pressure coming from water faucets both inside and outside the home. But sometimes the problem is in the tank itself; and if that's the case, there are a number of possible causes, beginning with these six especially common well pressure tank problems.
Determining the Nature of the Problem
The pressure switch may be faulty, which prevents the well pump from pumping water into the tank. To determine whether the pressure switch is faulty, first fill up a few one-gallon jugs of water in case the well pump loses its prime. Then shut off power to the well. Remove the cover from the pressure switch. If the points on the pressure switch are not making a connection, try filing them with an emery board. Restore power to the well; run water as normal. If the pressure is restored, consider purchasing a new pressure switch.
Sometimes the well pump loses its prime during either normal use or after a power outage. If your well repeatedly loses prime during normal use, there may be problems inside the pump. The pump may need to be repaired or replaced depending on whichever option is more cost-effective.
Ensure that the tank is tightly connected to the water supply of the well. You may need to replace the Teflon tape on the pipe of the pump and the pipe of the well where the pump connects.
"Tank sweat" usually occurs during the humid months of the summer, and can cause the tank on the well to become loose. This can cause pressure loss, or can cause the well to lose its prime. Tighten the tank. Prime the well if you need to.
Check for Broken Pipes
Broken pipes on the well can compromise water coming into the tank. Replace any broken water pipes on the well. You may need to prime the pump after replacing the pipes.
Air in water lines
Air in water lines can be a problem because the water coming from the pump to the faucets in the home can be blocked by pockets of air. This is common after power outages, or if the water supply from the well has been turned off for a long interval. When turning the water supply back on after an outage, gradually turn faucets on to allow air to escape from the lines.