What size pump ?

[Dswizzler]

Looking to add a pump to an easy oil change system and not sure what size to use. I have all the drain lines from the diesel engines and two diesel generators run to a manifold with shut off valuves for eack line, but not sure what size pump I'll need to drain the diesel. I have 2 detroit 6v92's and two gen sets. The longest hose run is about 12 ft and lift is about 2-3 ft.* Any suggestions ?

 

[timjet]

I installed this one: http://www.lfsmarineoutdoor.com/jabsco-oil-change-pump-17830-0012.html