replacing check valve on submersable pump???
My pump is about 280 feet deep and is cycling about every 7 minutes. I think it has been doing this for some time but I just moved it to a well house from a tight crawl space under house so I can diagnose better. I installed a new pressure tank and switch hoping it would help, it did need the tank as there was water on both sides of bladder. If I close the valve I installed before the tank it holds pressure. Does this sound like it is a check valve on the pump? Jay