I was going to suggest Bunnings as well.

You can get a plumber to add on a tap with a filter on it but to be perfectly honest save yourself the hassle and buy a ceramic water filter to keep on your kitchen bench.

My PIL never used a water filter while they lived in this house and just took the water straight from the tank. We live on a farm so we have a lot of dust etc there is no way I couldn't filter the water but I don't filter the water when I use it in my kettle.

I also wouldn't worry about the rebate and just get yourself a tank. They are not very expensive considering. You will need to have the tank cleaned once every 5-10 years just to removed the sediment that does accumulate at the bottom of the tank its a bit like cleaning a fish tank if you have ever done that.

I had to laugh (not in a bad way) about being charged for storing your own water.

Where we live we cannot claim rebates for installing tanks because we do not have town supply. The funny side of that is IF we ran out of water we would be buying the town supply - go figure! We also don't have town sewage and yet we have to pay for water and sewage as part of our rates. Just a way for the government to make money of people who are self sufficient really.

Nae x