I'm certainly hoping to make an upgrade to the 2013
2005 mobius lsv 2900lbs ballast
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Very good point
I now have the problem that the water level in the bag gets above the vent line before all of the air can be pushed out. I read somewhere that I'm not the only one with this issue. To fix it I removed the vent line and plugged up that hole again. I then installed the check valve on the drain line just before it exits the boat. Problem solved,no more air in my bag.