here is a mock-up of my manifold and pump placement. None of the parts have been glued together yet.
This view is from the Port side with the front of the boat off to the left. The thru-hull and shut-off valve will be to the right.
Pumps 2 & 3 are slightly lower than the 1.5" PVC manifold, and all of it is below waterline. These are Rule 1100 gph pumps.
The outlet on #1 is straight up, and 2 and 3 angle left and right. Does anyone see any problems with the pump outlet orientation?