Water Storage - Roof Rack

Fred, for 20 litre wouldn't a plastic jerry can suffice? Or even two. It would be the cheapest way and off-the-shelf in Darwin.

Look here & scroll down to 50 LITRE FLAT WATER TANK

Whilst I do not advocate carrying water on a roof rack you could do this.
Purchase a small 40ltr caravan tank and mount it on the roof laying flat and you could even plumb it so it could be used from that position. Cost around $80.
However there are great behind rear seat tanks available from many outlets.
BCF, ARB, Opposite lock and the like and these often come with all the plumbing including a 12v pump. At a price of course. There are also many types of water bladders available that you simply lay on the floor. These also from the above. I have also seen home made ones from Pvc pipe that people have fixed to a roof rack.

Thanks Guys,
I have ordered a 40 litre foot well tank from Opposite Lock and will continue to look for a 20 litre and flat container I can use for the roof rack with a tap fitting.

I now have several ideas from what you have given me.
regards

A 150mm stormwater pipe 1850mm long carries approximately 32.5 litres.

Glue on caps fit one with a tap, and put an inspection eye in the system to facilitate filling.

Low profile water tank carrying just over 30l. Personally I would shy away from putting all that weight up that high.

Duncs

Hi Fred,
Agree with Shaker - www.dolium.com.au. We went to 4WD and Camping Show at Perth in March and were specifically looking for something like this. We are leaving for a trip round Oz with caravan and kids for 2 years and although we are set for water with the van we needed a flat container for the rooftop, for when we are 4WD and tenting it. We are getting our 55L rectangular tank next week, will let you know what it's like but they did seem very sturdy and strong. We checked out the flat ones as well as the footwells but felt having one on the rooftop was best for us.
Cheers
Michelle

Hi Have just installed a 21Lt water tank by The long Ranger under my Prado
Easy to install and well out of the way. Tanks available from ARB. Far better than having the weight on the top of the vehicle
Cheers