Side wall bulkheads:

1/2" = 94gph
3/4" = 210gph
1.0" = 375gph
1.5" = 844gph
2.0" = 1500gph

Floor drain bulkheads:

1/2" =  150gph
3/4" = 338gph
1.0" =  600gph
1.5" =  1350gph
2.0" = 2400gph