I have the exact same problem. The 500 litre fuel tank
seemed like such a great feature until I realised how long it took to burn 500 litres.
What I do, is I keep the tank full and use a sealed pump with a bit of piping on it that I can reach the bottom of the tank with.
Every so often I pump the water
from the bottom of the tank.
I'm still not thrilled with the arrangement. My tank is 35 years old, so I'm actually considering replacing it with a smaller tank.
I also would like the hear others solutions to this problem.
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