More on the fittings used:
These came from
Omega Industries The specs are
here. I found them to be very reasonably priced ($7-9 apiece) and very sturdy. Being all plastic, there was nothing to corrode and they are shutoff when disconnected as well as very easy to operate. I remember looking all over creation for hours on the Internet before I found these. They are rated for food service so they meet certain minimum standards. They also have bulkhead fittings which I used on the PCs.