ballast bags won't completely empty

[MLA]

Mike,

What style of pumps does your system have and how much water is left in the sacs? Are there check-valves in the vent lines?

[mikeaddy]

Mike,

What style of pumps does your system have and how much water is left in the sacs? Are there check-valves in the vent lines?

Pumps ars original factory in the 2008 moomba mobius lsv (but I don't know what style they are), they're left with about 1/4 full. No check valves in the lines.

[MLA]

A forth of the water remaining in the sac is pretty significant.

[WHMOJO]

I have a similar problem... Mine always have water left in them even when the gauge reads 0%. Rear bags easy, i lift them to help drain. Hard tank tougher. I check for full drain while on the lift. I can hear / watch the water pour out and hear the flow slow down before the pump starts to whine. I don't have check valves either but its hard to believe that i am draining air when the bags (rear) are full....