Osmio Bella Chrome 3-Way (Tri-flow) Kitchen Tap - All Questions

The nasal cannula is included. Yes, we do ship to Australia.

No the bottles uses a spe pem membrane method so it will not allow the pH influencing gases through it, just h2

Good question! The carbon can be crushed and disposed with your garden waste or can be added to flower beds (it will improve soil drainage and will slowly biodegrade); the plastic cups can be disposed in the recycling bin.

1) Yes, all our 3 way taps do
2) Yes, and if you use a Reverse Osmosis system you do not need a hard water bypass, as the reverse osmosis filters out the sodium carbonate added by a salt softener system, so in this case you just bypass the garden tap.
3) Salt Softeners resin gets damaged by chlorine, making them 8-10% more inefficient every year, so go well with Carbon Block Whole House Filters and others designed to remove chlorine. This makes softeners life radically improve

1) Yes, all the 3-way taps neck/spouts swivel. There are O rings there to make the seal. It is important to grease them when the movement inevitably gets more stiff, or else those o rings will get damaged and make a leak there, there are spare parts for all of them.
2) Yes, there are 3 separate hoses. You can use RO systems to avoid needing a bypass and to get the best water quality.