[Richard]

I do not know the particulars of your valve. So this is a conceptual explanation of what needs to happen.

The valve normally will have three ports. In the non powered, normally closed position, the two ports that will allow air to pass through to the atmosphere. In the powered position, the through passage should connect the pump to the check valve.

The valve changes the air path when power is applied. In the non powered state, the valve should allow the air in the line between the compressor and the check valve to escape. When the valve is powered, the path should close the path to the atmosphere and open the path from the compressor up to the check valve.

If you go to the Square D box, you will see two leads which power the compressor. The leads for the solenoid valve will connect right there. Do not connect the solenoid leads to the power in. When the Square D box tells the compressor to come on, then the solenoid valve will be powered at the same time. That should close up the path in the system and allow the compressor to build pressure.

Can you give me more detail on the solenoid valve, so I can look it up and confirm what I told you? I can’t read the label in the photo, since part of it is obscured.