maby
Well-Known Member
One pragmatic way if you are in a marina for a while is to leave the valve open but go to the marina loos for solids (and obviously not flush any paper down). I have seen people swim in marinas but I always think they are braver than me.
As I said a number of posts up, that is what we normally do. In the depths of winter, we may close the tank valve and use the heads for more solid functions rather than walk along a dark pontoon in driving rain at 3am - but we will then either use the marina pump-out if there is one, or pop out a few miles to dump the tank.