Stop spending money on expensive refills! If you've purchased a new SodaStream machine, you'll notice all of your old bottles won't fit. Frustrating, I know, now you have to go and buy more expensive canisters. Simply hook this up to a 2.6kg or 6kg Tank and not worry about frequent refill costs.

A typical Soda Stream cylinder can only carbonate up to 60L and will cost for every fill.  So given these figures, the larger cylinder and this hose will pay for itself off once you fill the 2.6kg gas cylinder once.  It's a no-brainer! 

This particular model has a quick disconnect feature on the inlet side of the Terra/Art/Duo fitting. This means you only need to drill a 19mm hole without undoing any threaded fittings. Because of this feature, they have removed the gauge in order to stay competitive in the market.
In order to do a leak test it will be the exact same procedure. But to identify if you have a leak after a few ours of having the system off. You'll simply push the carbonate button/lever on your Sodastream machine. If you hear a gas spurt, you do not have a leak.
We would recommend a quiet, well ventilated space to do this.