What it says in the title. Right now there is no way to transfer water from one tank to another which means moving where your water tanks are is a problem. This is doable in Rimefeller, but not in Bad Hygiene so I was hoping it could be added. Also partially so I can haul a bunch of water tanks down to the planet, fill them up, then take them back up to the ship since the SOS2 integration is poor. The water from the life support doesn't fill tanks and so can't be used by water heaters. And the ship is getting a touch massive for landing to be practical. Need to build an entire refinery complex and a bunch of booster engines to get it back into space.