I have a Sears captive air water tank (model No. 390.29171) that stores water pumped from the well. When we took possession of the house, there was no water in the tank or lines, the water pressure gauge was stuck at 95 psi (on at tank with a maximum working pressure of 75 psi), and the air pressure in the tank measures less than 10 psi.
According to the information on the tank label, the pre-charge air pressure should be the same as the cut-in pressure setting of the pump pressure switch.
My question is, how do I find the cut-in pressure setting of the pump pressure switch? If I remove the covers from the two pressure switch boxes, is there something that will tell me what the setting is?
The photo shows the pump cut-off pressure switch. There is an identical box without a label to the left of it which is partially visible in this photo. I'm guessing this is the pump cut-in pressure switch?
Thanks in advance for any help.