In our caravans there are a good few meters of plastic pipe, plus the aqua roll has a big surface area inside the barrel. All these surfaces will develop biofilm after even short contact with water. Powered drain down videos such as those on YouTube shows us that even though we go through the drain down procedure there is still almost a litre of water lurking in the water pipes. Imagine how 'off' that water is going between holiday trips!
Read More