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Water Tank

Water storage is a critical issue for all four wheel drivers. Not only do you need to carry large amounts of fresh water, you also need 2 alternate supplies in case of contamination from one source. We suggest a couple of small plastic jerry cans for backup but for the main supply, the best water carrying solution is a stainless steel water tank. In this article we look at the major issues related to water storage and discuss how you can find the ideal solution for your needs.
Article By: Michelle Jacka   Updated: 10 Jun 2008
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 Water Is Important

Driving in the desert
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Every time you take your 4WD off-road you must be self-sufficient by carrying your own reliable source of drinking water. You must ensure that you carry at least 2 litres of drinking water per person per day as well as additional
cooking and washing water requirements. In fact we also try to ensure that we always have a about 10 litres of spare water in case the radiator needs to be refilled. This could mean you require 40 - 100L of water storage.
Plastic jerry can for water
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Stainless steel jerry can for water
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Design and Construction

Water tanks need to be fully internally baffled and should have an expansion chamber incorporated in the design of the tank to ensure sloshing noises and extremes of temperature do not make the unit impractical. Each individual tank should be pressure tested by the manufacturer to ensure there are no leaks in the welds.

Practicalities

Look for practicalities in filling your water tank. Is a hose required or can a funnel be used to transfer water from, say a bucket, to the tank and if so is the height and access practical for you to do this?

Likewise, look for practicalities in using your water supply. How easily can you drain a quick cup of water or wash your hands? Does the tank require a pump or power supply or will it work on gravity feed? How secure is the shut-off valve and can you obtain and carry spare parts? How will you know the level of water left in your tank? Is there a level gauge? Does the tank fully drain?

Pouring from an internal water tank
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The outlet valve on a stainless steel water tank
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Spare wheel bay under a Toyota Landcruiser
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Example - 80 Series Toyota Landcruiser

Typically, the spare wheel bay under the body of the vehicle is used for water storage and some tanks. These tanks are available for this model of vehicle and are specifically intended for that location. However, the spare wheel bay is also the ideal place to install a long-range fuel tank. Unfortunately in this case, there’s only one underbody option left for water storage - being a small recess under the passenger seat area. The limitation being that only a small tank of approximately 30L will fit here.

Now generally, a 40L tank contains just enough water for 2 adults to last a couple of days whilst
camping in the bush. If you were to take into account the water needed for drinking, personal cleaning and hygiene, cooking and the minimal washing of dishes, you can imagine how it all adds up. That said, it may be a better option to consider a larger tank such as a 65 Litre water tank.

Internal Water Tank

Opting for a larger tank requires more thought on another installation area of the vehicle. A good option is to install an internal stainless steel water tank. Many manufacturers offer a standard internal design to suit most makes/models of popular 4WDs such as the 80 Series Landcruiser. Please note however, that if you have any storage drawers or cargo barriers, then you may need to work with a manufacturer to design a custom made water tank.

Inlet pipe for a stainless steel water tank
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Stainless steel water tank installation
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Stainless steel water tank installation
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What Others have Posted

Fairlane : 21 Sep 08 19:17
Hi all, I am wanting to put a water tank under my 98 troopy. looks ...
Kerrod : 14 Nov 07 11:37
has anyone installed an external tank in a Prado (98) and if so wher...
skippman : 27 Sep 07 17:42
have recently put a 60 lt tank on camper trailer with a 12 vt pump, ...
Rainman WA : 23 Jul 07 12:46
I have a 65 litre water container in the rear of my vehicle that cam...

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