extra water tank

Here are a few options that you might be able to make fit with the addition of some support straps.
http://www.ovesco.com.au/products.php?catname=Water%20Tanks%20and%20Tool%20Boxes&cat=5&sub=21&subname=Water%20Tanks

Trev - Do you require a metal or poly tank? Getting a one-off made to specific dimensions could be costly. I don't know of any sheet metal crowds still in business making small sheet metal tanks, they nearly all went out of business in the late 1990's as poly and PVC tanks took over.

A caravan supplies and accessories mob might have a ready-made poly tank on the floor that will do the job. There's a lot of ready-made tanks available.

Most sheet metal crowds in Perth today would only be interested in mining project jobs, or air conditioning ducting, or stainless fabrication for housing interior work.

However, there's a crowd that look like backyarders, and their place always like a bomb hit it - but they have been in business for donkeys years, and they specialise in small jobs.
The business is Federal Sheet Metal, and they're in Jackson St, Bassendean. They could be worth a call if you require a custom-dimensions sheet metal tank.

http://www.hotfrog.com.au/Companies/Federal-Sheet-Metal-Works

Cheers - Ron.

We put an extra tank under our small pop top caravan. Got a poly plastic one from Camec. Mounted it with metal straps....easy to plumb in and even mounted a guage in it.
Camec has several locations in Perth...just google them.

Cheers

Trev,

Rota moulding in midvale. They make quality tanks and much thicker than most poor quality tanks that some stores sell. The range is huge.

As always, you get what you pay for.

BW.

What do you mean by "as the one from jayco wont fit unless you get the camper made to take one"? You will need hanging brackets to fit any tank under you Swan. Here are some.. They fit various caravan tanks.

Try looking up BOAB tanks, local to you at Dolium
Custom tanks will cost $600++ - metal or plastic