Originally Posted by harley
That does not make sense. I never use my city water hook up and always start with empty water lines and the pump fills them from the tank. It will even run with empty tank...not recommended though. There must have been more water pressure from your house tap than the 40#(guesstimate) pressure that the pump needs. Pump will not start if the pressure in the system is more than its set pressure.
There shouldn't have been any pressure, I drained all lines and opened all facuiets. I screwed caps back on all low drain points, put valve to tank, filled for about 10 minutes "never saw water come out overflow, but showed full on display", disconnected hose, put valve to normal, turned on pump, and nothing happened. Then I closed all facuiets then opened one at a time, still nothing. So I turned valve to city, hooked hose back up, opened facuiets, a lot of air came out then water started flowing. Un hooked hose turned valve back to normal, turned pump on and water flowed good. So I was assuming the pump didn't work Bc the lines were empty.