Thanks for your reply, the problem I've had is at the fwd end of the tank.
The water comes out from the ballast tank via the tube at a 12 o'clock position (to help the ballast tank bleed itself of air)
It then has to negotiate the fwd plane retract mechanism and then do a 180 bend.
All with zero space and no visual observation. I didn't want to have to fit a fwd hatch if at all possible!
Once clear fitting the outlet overboard isn't too much of a problem (I HOPE)
Regards
Ex docky