Axis Wakeboard Boat Forum

Hey guys,

I figured someone here must know what's happening and knows the easy fix.

I've got a 2013 A20, and the center tank fills slowly on its own. Slowly enough that it is probably only 10 gallons after driving for a while, but enough that I don't want to have to keep pumping it out. The rear tanks never fill up without turning the pumps on.

The pump is not running, switches are in the off position. The pumps work properly when I actually want to fill/empty the tank.

I have the PnP hose setup but have never touched it; nor have I added extra weight. This is just a problem with my stock center ballast.

Thanks for the help!

There are anti siphon valves that need to be adjusted. For the front and center ballast they're behind the kick plate under the helm. Actually now I can't remember if both have it or just the plug n play. If an antisiphon valve doesn't exist then you'll need to add one.

You may try closing the port ball valve in the access door by the driver seat, if the front pnp isn't hooked up the water pressure while under way may be pushing by the check valve and leaking into the shared vent via the Y connector for the pnp.
The tank should have an anti siphon but the pnp has a check valve

Thanks for the help. I'll check those this weekend.

You're not alone...mine has been doing this as well. It did it before I had the bow sack installed...I took it to the dealer and it seems to have stopped. I didn't get a chance to find out how they fixed, so my apologies for not sharing.

I had the ECM re-flashed for the exhaust temp issue as well.

EDIT (9/8/2015): Not fixed...now the bow ballast I added AND center tank filling on their own.