The regulator is suitable for Butane or Propane and the pressure of the gas is delivered at 30mbar, it is the 'end fitting' on the flexible hose that determines which bottle you use, ie. quick fit/clip on for the Butane and a Left Hand male thread for Propane, if you wish to change bottles then you have to change the flxible hose
------------- " Oh! but for the grace of God go I "
If you're planning to go away early in the year then I would suggest that you use propane. Even at temperatures which are above freezing but low, e.g. 4 - 8 C, the butane flow will be poor. It actually takes a very low temperature to freeze a full aquaroll of water, due to the volume. The pump can be taken inside at night, along with a container of water for use in the morning. Some take the aquaroll inside, others lag it, to avoid it freezing.
------------- Caz
If you can't see the light at the end of the tunnel, just keep going till you go round the bend.
Caz said what was important at the beginning and that is Butane is often useless in winter but will not actually freeze or become dangerous because of cold weather. Its also worth saying any bottled gas should be stored out doors and well away from dwellings.
Butane actually stops turning from a liquid to gas at -2c (freezing) but because the process of 'evaporation' produces more cold so further reducing the bottle temperature the actual useful outside temperature should be more than +2c. Propane stops gassing at -47c so is never a problem...almost!!
Propane is 31% less efficient than Butane so Propane under the old system was delivered to the caravan at a 33% higher pressure to compensate, the slightly higher difference then gives Propane the edge in a race. Always assuming that is.. either regulator is totally accurate and that is not often the case.
Because Butane and Propane have different energy values the two gasses as liquids weigh differently and this accounts for 6 and 7kg bottles again to even out the differences. Not exactly though but on quoted retail price they should be the same price for the energy stored, except you can quite often get good discounts on Propane.
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Topic: Butane Freezing
