Thanks! The solenoid valves are for both air and fluids. The only thing I don't like is the ID on the valve is only about 3mm whereas the pump and all the intake plumbing is 5mm. So far, I haven't been able to find any 5mm valves.
I recently bought a 9/16-24UNF tap and die, but all these fittings were made from pieces of scrap sink shutoff valves. For the female fittings and blind caps, I turned down the compression nut on a lathe. The piece for the tube is made from bar stock and I just soldered them together. Same for the male threads.
For the lugs on the fittings, I milled t-shaped pieces from .064 flat stock and soldered them in place.
I'm working on the front bumper swivel suction fitting and plumbing now. Should have pictures of that soon.