07-18-2017, 11:56 AM
Sorry but realized I misread the previous post and didn't read that you had removed the tank. So this ETA is a complete re-write.
As I understand it, the pressure switch is banking on the difference between bladder water pressure and the air pressure within the tank to function. They do make pumps that work without a pressure tank but I don't think yours is one of them, at least not in the current configuration. You can try dialing down the upper pressure limit to about 20 PSI and see if that works. But I don't know if your pressure switch has that range. You will also have to dial down the lower pressure limit to something a bit lower than that or else the pump won't kick on. I think the "stock setting" on a pressure switch won't allow it to shut off as you've described what you've done because the house plumbing system has more volume for the pressure to explore. Think of the PSI at the end of 100' foot hose hooked up to such a system. Will be substantially less than the first spigot near your pump. Trying dialing down the pressure switch upper limit if you can, and the lower limit somewhere below that. Just an idea. I AM NOT A PLUMBER. I have never played a plumber on TV.
As I understand it, the pressure switch is banking on the difference between bladder water pressure and the air pressure within the tank to function. They do make pumps that work without a pressure tank but I don't think yours is one of them, at least not in the current configuration. You can try dialing down the upper pressure limit to about 20 PSI and see if that works. But I don't know if your pressure switch has that range. You will also have to dial down the lower pressure limit to something a bit lower than that or else the pump won't kick on. I think the "stock setting" on a pressure switch won't allow it to shut off as you've described what you've done because the house plumbing system has more volume for the pressure to explore. Think of the PSI at the end of 100' foot hose hooked up to such a system. Will be substantially less than the first spigot near your pump. Trying dialing down the pressure switch upper limit if you can, and the lower limit somewhere below that. Just an idea. I AM NOT A PLUMBER. I have never played a plumber on TV.