Guest Had Enough Posted October 11, 2014 Share Posted October 11, 2014 I've just bought a newish 'van and it has a brilliant gas system, which works with Calor or refillable cylinders. Inside the 'van with the rest of the controls is a small display panel. You open both cylinders and an led on the display shows you which cylinder is in use. When the first cylinder is empty it automatically transfers to the second one and the original cylinder's led turns red, so you you know it's empty without even opening the locker door. You then have loads of time to refill the first one or swap your Calor cylinder. It even has a winter setting which warms the regulator and changeover unit system to stop the gas from freezing. I think it's a Truma accessory. Link to comment Share on other sites More sharing options...
lennyhb Posted October 11, 2014 Share Posted October 11, 2014 Frank, it is a Truma "Duo C" either standard or an option on all Hymers if you have the DuoControl CS Hymer fit the Duo C with it. I've got one too. :D Link to comment Share on other sites More sharing options...
Derek Uzzell Posted October 18, 2014 Share Posted October 18, 2014 Revisiting the original inquiry, the Prakto-made steel user-refillable bottle http://www.autogasshop.co.uk/prakto-motorhome--refillable-210-ltr-steel-gas-bottle-new-2014-specification-904-p.asp http://autogasleisure.co.uk/pdf/prakto.pdf has a contents-level measuring mechanism claimed to provide reliable readings from 80%-full right down to empty. Link to comment Share on other sites More sharing options...
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