Ballast tank check valve??

[pitts12driver]

I have a 2022 G23 with the optional ballast. I've never left the boat in the water overnight until this past Sunday. On sunday evening, we came back from surfing, all tanks were emptied, and we tied up in a slip. On Monday morning when I came out, the port rear tank was at 45%. All 4 other tanks remained at 0. My assumption is that something is incorrectly configured, or a check valve has failed such that it was able to siphon fill. I'd appreciate any guidance or places to begin looking. Thanks so much - AG

[jpwhit]

Not familiar enough with the ballast plumbing on that boat to be definitive, but most likely the ballast pump impeller needs to be replaced. Most systems rely on the impeller to keep water from siphoning in. When the impeller is worn, water can leak around it. Some years of G series boats have motorized thru hull valves that would also prevent siphoning, but they are often disconnected during wintering and not reconnected.

[Scooter G]

I would have to take a closer look at my system, but I know for certain that there are ball valves that auto open and close in the process.
Check the rear hatch (batteries & power switch), the only way for water to enter the system inadvertently is for a valve not fully closing, either stuck or needs a cable adjustment.
Get your eyes on it, and run the system fill & drain, see what you see.
I do a spray and wipe every so often with CRC 3-36, lubricates & protects.

[BasaltRMK]

Was there actually water in the ballast? Could just be the ballast sensor failing (lot of threads here about that known issue). Verify that there's actually water and not just a false reading. If it is water, check to make sure that the ball valve servo levers are connected. Your boat has this system, and sometimes they are / become disconnected.

- bob

[Scooter G]

pitts12driver, what did you come up with here?

[pitts12driver]

Thanks for the help Planet Nautique team - badly adjusted cable...