Water Tanks

A solution of household bleach.

Milton for washing out baby bottles. The instructions and mixing ratios are on the label.

Cheers.

g'day Ray,
My father bought an old campervan ,and the water tank had the smell of a strong cleaning product in the tank and when he flushed it out , it was still there , he then found a product at the local camping store called Tank Clean,there was enough in the container to clean it 3 times ,but he only bothered to do it twice ,because he was very happy with the job it had done.I hope this helps.
Cheers John.

I have used ordinary bi-carb soda you can buy from any supermarket. It is cheap and effect.

I would also agree with the milton baby bottle wash.

The stuff from a caravan shop called tank clean works but is much more expensive and if it really smells you will have to use lots.

David