Re: Drinking water tank water.
You should have an access plate (if you dont consider adding one).
I empty the tanks in the winter. To empty the tank i use a small rule pump. I wired in a cigarette lighter adapter to power it. And i have a length of hose connected to the discharge. I drop the pump in the tank,plug it in, and let it empty the tank. I use a sponge to scrub and get the last of the water.
1977 Bristol 29.9