Quote Originally Posted by mmandley View Post
Worst i have had was a 750 bag full and the drain pump air locked on me. I couldnt get the line off and i couldnt reach the pump due to the bag. I had to keep fillign the bag to force water threw the drain pump then it finally started working. I used to get air lock all the time with my 400s. It sucked. I havnt had air lock or drain issues since i vented the bags.
Another nice part of the reversible system is that you don't have to vent the bags, they suck completely flat when done and if by chance there is any air in the bag it goes out the overflow.

I didn't go the timer route in mine either. I keep a pretty close eye on my bags and if by chance I forget or get distracted, I can hear the pumps change in sound when they're done. Impellers aren't that expensive to replace either if in fact you manage to wear one/them out.

You're right about the power though. They draw A LOT OF POWER! Like 13a each and require 25a fuses. I run my boat while filling/draining as I haven't installed the second battery yet. But for the 8 minutes it takes to fill all 4 bags it really isn't an issue for me. Oh, actually a bit longer if I have to fill the additinal 750 in the seating area which I do after the bow sac is full. I have put in a T-fitting in the line and a couple of shut off valves with an extra line for filling/draining that bag.

Got the idea from a Blog on a Centurion Avalanche Ballast Install. Kinda looks like this:

But I have this on the end of my hose:


Works Awesome!