A 9kg gas bottle can get up to 15 hours of use and a 4kg up to 7 hours, this is on the gas being set to the highest settings. In summer or warmer climates, you probably won't have the gas set this high. Needless to say, it's a pretty long time!
For the Americans, a 20 lbs Tank will yield around 12 hours. It's a little less than the longevity of the Australian Spec unit and that's because we're allowed to have a higher gas flow setting for you. This is a good thing because it means you can get heat more water which comes in handy in cold conditions. Again, this is on the 'high' setting.
The easiest way to explain it is that the HOTTAP runs on the same gas that your home BBQ does.
In Australia, we use (most commonly) 9kg LPG cylinders. In NZ the cylinders used are nearly identical but they're labelled as 'UPLG' instead. The 'U' stands for 'Universal and it's because in New Zealand (and many other countries) the mix proportions of Butane and Propane in the cylinder can vary quite a lot, whereas in Australia it's fairly consistent. It's not a concern and HOTTAP has been tested and approved with a much wider range of propane-butane mixes than would be found.
In the United States you guys call them a Propane Tank and the standard size is 20lbs but they can also come smaller.
For information about the different size bottles, check out this article
The HOTTAP can be connected to a bayonet fitting, however, the only hosing we offer with the HOTTAP is a 1.2m Gas Hose and Regulator (as standard). Any other fittings that maybe required to fit onto a bayonet can be sourced from a hardware or plumbing store.
All HOTTAPs include our gas quick disconnect adapter, to allow your to connect your gas to HOTTAP (and other appliances) without the need to tighten the fittings with a spanner and check for leaks at each use.
The Gas hose we supply is a standard BBQ style LPG / Propane hose. This varies from region to region, rest assured that the hose you'll get will be the right one for your country.
If you'd like to know more about what 'type' of gas you need, read this article
In Australia and NZ:
The standard and most common size is a 9kg LPG cylinder, but LPG cylinders are quite common in other sizes right down to around 4kg. Just make sure that the cylinder has a POL connection to attach to the gas hose which is supplied.
Smaller bottles down to around 2kg have also been known to work well but will require adapters to connect to the gas hose we supply.
A common 2kg cylinder will have a 3/8" Threaded outlet, for these you can purchase an adapter like the one in the picture below which will connect to your standard BBQ gas hose.
The left side thread is 3/8" LH (Left Hand) BSP and the right side is a standard POL Connector (to your gas hose).
20 lb Tank
In the United States, you can use a propane tank size right down to around 4.5 lb, the main thing is to make sure it's compatible with the supplied gas hose (it's called a QCC 1 Connection on the bottle side).
1 lb Cylinders:
To use a 1 lb cylinder, you will need a purchase an adapter like this one which will allow you to use your Joolca supplied hose to connect to the smaller cylinder.