Ho's? gettin enough?
 

putting in a integrated bow sack in my '11 moomba LSV.
gonna use the jabsco reversable pump.

how much hose do i need to buy? (total for the fill/drain line coming from the back, and the vent line)

Don't know how much you need,but this might help you too http://www.foreandaftmarine.com/PVCHOSE.HTM seem to have good price on hose.

Depends on where pumps are and how your running the hose. Somebody could tell you a length and could be all wrong. Your going to need to get in there and plan it out before making that decision.

9.3 feet

Are you going to use 3/4" hose to match the factory vent line? I always tell people figure 10 feet of the 3/4" hose and between 20 and 25 feet of 1" hose. It all depends on the path you take from the engine compartment to the bow. Run the route before hand using rope and then measure the length if you want to get exact. Hose is pretty inexpensive so if you guess wrong you are not out a ton of money.

jay: thanks!
Nacho: lol
Spencer: no its all 1", i cant imagine needing that much vent line. knowing where the front vent thru hull is, and those legs are so long on the arm, i cant imagin needing more than 5-6 of vent. but i couild be wrong. and the boat is only 21'-6" so i wouldnt think i would need 25 feet, but again if gas tanks etc get in the way it will each up running feet fast if i have to go around objects. the cheaper price listed above will make it easier to buy some extra.