|
My guess is that your pump is within a pump vault in the tank. Water flows through a filter into the vault, the pump pumps the water out of the vault. The pump floats are also within this vault as well.
Now if this filter starts to clog up, the pump will come on and pump water out of the vault faster than the water can flow through the filter and replenish the volume of the vault. So the pump empties the vault and the pump shuts off. However, the water level in the tank is still too high and it refills the pump vault.
Ground water infilitration is a possibility as well, but I think the scenario above is more likely. How old is the system? Has there been any maintenance? You probably could find a company nearby to clean and inspect it on a yearly basis for $150-$250 or so. The first time you have to pull the lid and clean one of these filters you will see it is worth it.
If you want to try to clean it yourself, get some heavy, long rubber gloves, pull the filter up out of the vault, and use a pressure washer to spray it down, with all the wash water going back into the tank. If you don't get it taken care of soon, you may wind up with a backup. If not you will certainly shorten the life of the pump.
FYI, I design these sorts of systems day in and day out.
|