VB tanker potable water from Australia as you can't uplift it from Indo due to the quarantine issues
Not always, on a few occasions potable water has been topped up in DPS by mistake by ground crew. In these cases, a PA is made (or it should be made) to pax advising that there will be no hot drinks, and water from the aircraft taps is not to be consumed. On arrival into Aus, the potable water tanks have to be drained and treated before the next departure.