While there are lots of configurations for these manifolds, these options are the most common. You can bushing these down easily, if need be, to fit smaller plumbing. All ports point up.
Slip=2" plumbing fits inside
Spigot=fits inside 2" plumbing fittings
Ports=Hose fits inside
672-4200 = 2" Slip X 2" Spigot with (4) 3/4" Ports
672-4270 = 2" Slip X 2" Slip with (6) 3/4" Ports
672-4640 = 1.5" Slip X 1.5" Spigot with (10) 3/4" Ports