[Chester Stone]

Richard, this photo shows my existing 12v water discharge valve - Figure "A".  I assume the 120v McMaster-Carr valve will be plumbed in the same place at the bottom of the sight bowl.  Electrical connections will go to the air pressure cutoff - Figure "B".  In my setup, the air check valve is shown as Figure "C", and I assume this is the downstream check valve you are referring to.  Please advise if my assumptions are not correct.  Thanks