I have a 98' 322, but not sure on the holding capacity of the fresh water tank, the pump out head (grey water tank), or even how to get the sink or the pump out to work? Is there a switch on the dash along with the water pump switch on the panal, like a ACC. switch? Any help or advice would be great.
Thanks,
Mike

You're probably right around 15 gal on each. Do you have vacuflush head or a porta-potty with a holding tank? (could be less holding with a porta-potty)

There's nothing on the boat that does the pumping out. You go to a pump station, remove the cap and just suck the grey water out.

You should have a switch on the panel for the fresh water pump.

Thanks for the response and all your help

yep its the acc switch to make the sink pump work