SAFETANK Installation Instructions

Find out more about SAFETANK installation and operation, with our detailed guides which you can view below. Our innovative water storage solution is available to order for caravans across Australia and will ensure your caravan’s weight distribution is properly managed.

Don’t hesitate to get in touch with our team today to find out more about SAFETANK. Whether you want to place an order or need installation or operation support, we are here to help.



At one end of the tank, there are 2 SERVICE fittings.

One is a 40mm male connection which is both the inlet and outlet for the GREY water storage.

Adjacent to this, on the same end is a standard 1 inch male fitting which is both the inlet and outlet for the FRESH water.

At the other end of the tank are 2 female 1 inch fittings which serve as breathers. The one on the same side of the tank as the 40mm is for the GREY water, the other is for the FRESH water.


The tank should be fitted with the SERVICE fittings toward the OFF SIDE. That is, the side furthest from the kerb.

IMPORTANT: There must be a 30mm spacer fitted to the lid of the tank at the service end to provide optimum use of the tank. Fixing to the chassis should be with the use of a MINIMUM of 2 stainless steel straps, at least 50mm wide and capable of holding 150 kg per fitting point. The strap should also be fitted with a suitable rubber cushioning. Likewise, compression points to the steel chassis should be fitted with rubber strips. This also helps prevent electrolysis between the 2 dis-similar metals


It is common to replace an existing fresh water tank with the SAFETANK. This serves a couple of purposes.

  1. It negates the need for an extra tank.
  2. Keeps the weight where it should be.
  3. Provides a new “clean” fresh water tank

As the SAFETANK approximates the size of common 84lt plastic tanks, it is usually a simple procedure to swap over the tanks, using the existing mountings and fittings (if suitable).


It is important to note that the water connections are both entry and exit.


The grey water is fed the 40mm fitting.

The ball valve outlet and should be before and slightly below the 40mm entry to the tank to provide a solids and sand trap for the grey water tank. This also allows for the tank to be bypassed when connected to a sullage hose.

This can be achieved by the use of a “T” piece and a slightly downward angled connection through the right angle into the tank.


The fresh water should be connected via the 1 inch coupling to a gravity field inlet located to the side of the van and adjacent to the tank.

The tank can also be filled via a hose coupling via a “T” connector, but this hose coupling MUST be fitted with a pressure reduction valve otherwise over pressuring of the bladder can occur causing the tank to burst.

Operation Instructions


  1. Turn on your tap or shower, fresh water comes out.
  2. The used waste (grey) water, runs down the drain and is stored in your tank.

If you want to get the most out of your SAFETANK, you really should read the next bit. It also covers some important safety stuff , ensuring you understand how our new invention works and the safety surrounding grey water storage.




Your SAFETANK operates differently to every other tank. There’s a couple of things you should know.

  1. Your Safetank MUST be fitted in accordance with the installation instructions.
  2. Both the Fresh water and the Grey Water fill and empty from the BOTTOM of the tank. (Trust us, it works better)
  3. Your SAFETANK is designed to be transported and used in a FILLED or totally empty condition.
  4. You need to make sure that the Grey Water filler/waste pipe (40mm), slopes DOWN towards the waste valve. THIS IS VERY IMPORTANT. (see installation instructions)
  5. For the first couple of uses, there will be a slight plastic taste and smell to the stored fresh water. This is normal and is a result of the welding of the bladder in manufacture.

We suggest you flush it through a couple of times using a dash of vanilla essence.

It should fade away fairly quickly.

  1. When you are camped in a place where you are connected to mains water and sullage, you can bypass the Grey tank by simply opening the outlet valve attached to your sullage hose.

When using ANY Grey water storage, you must remember that EVERYTHING YOU PUT DOWN YOUR SINK AND SHOWER will be stored there. It WILL eventually turn toxic if it is left there. Flush any grey tank regularly!!!

You can minimise risk in 2 ways:

  1. Control what goes into it.
  2. Don’t pour food scraps down your sink. Use a strainer to catch any little bits of cutting board waste etc.
  3. Minimise the amount of bodily soil in your shower. (Don’t pee in the shower)
  4. Rinse off any sand, excess dirt etc BEFORE showering. This is very important with the SAFETANK, as sand is very abrasive and may damage the outer bladder.
  5. Add 2 capfulls of White King or similar, to the first 2 litres of sink water each time you start using the Grey water storage.

When cleaning the shower: most brands of shower cleaner contain corrosive chemicals. These will shorten the life of the bladder. Using diluted vinegar or the “Earth” range of cleaners will prolong the life of your tank and still provide a good result.

Grey water should be stored for the MINIMUM time possible.


Inside that strong, shiny welded box, there are some things going on.

Firstly there is a DOUBLE bladder. That is; there is one bladder inside another. The INNER food grade bladder is housed within a second, heavier PVC bladder to give a double layer of protection between the fresh water and the grey water. In between these two bladders is a solution of detergent. This is designed to leach through any breach of the bags and act as a warning of possible contamination. Upon any sign of detergent in your fresh water, stop using that tank immediately.

The Bladders are designed to be oversize for the tank so as to completely form to the outer tanks dimensions. However, we have built in a grey water reserve which allows an extra 5 litres of dedicated grey storage.

The bladder, is only anchored to the bottom of the tank at the fill/empty outlet. The rest of it is anchored to the top of the tank, allowing it to expand downwards on filling, then float upward, as the fresh water is used and turned into grey water.

This serves two purposes:

  1. It ensures the body of the bladder is always higher than the outlet, allowing for maximum use of the fresh water.
  2. By floating the bag above the grey water, the risk of abrasion damage from solid contaminants on the bottom of the tank is minimised.


The Safetank is designed as a combination fresh/grey water storage system.

It works best when used as designed.

Flush and sanitize the grey water storage regularly.

The fresh water bladder will empty more completely if the grey water tank is used.

ALWAYS sanitise your pipes and tank at the end of each use. This applies to ALL grey water storage systems.


It’s simple and if you follow these few directions, your SAFETANK should give you years of trouble free service.

ALSO….. We have a “NO ARGUMENTS” policy as to warranty claims caused by material or build failures.


For more about SAFETANK installation,
call us on 0412 649 360

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