After much debate about grey water tank (do we, don't we), do  wins.  Only problem is we would be sacrificing too much under bus storage room to install the 3 x 200 litre water tanks we have (drinking water, house water and grey water).  So decision made, we are having grey water storage, but the drinking water needs to shrink to 100 litres. 

So Brad being Brad decided to re engineer the tank and cut it in half.  A little plastic welding later (in Melbourne's current 44 degree heatwave) and we now have 2 x 200 litre and 1 x 100 litre tanks to be installed up the middle of the bus.   The converted tank is for drinking water storage

So of course this means that two taps are required.  One for house water and one for drinking water (not exactly the look I was going for but certain I'll live with it in order to have clean quality drinking water).  The bathroom plumbing is also underway

FYI - I still hate the mirror but have yet to come up with a way to replace it (without ripping the walls down).