My California Air Tools Compressor keeps leaking from a  valve located on the top of the unit and will never build up pressure.
The valve is a 1/4" fitting with a small hole in the top.  I think it is supposed to close or possible relieve over pressure, but not sure.
It is located on the top left side of the compressor and is located in the line that connects the compressor to the air tank.
Can I purchase a repalcement valve ?