Fluid Transfer Pumps

[Harky]

I just pour in from 20l drums with a funnel. I have this http://www.ebay.co.uk/itm/1-3L-TRANSFER-...317wt_1166 funnel. I cut the very bottom inch or 2 off it to make it flow a bit quicker, then I open the boot and clip the clip onto the gas strut. Funnel stays in place and only takes a minute to pour it in, only problem is you've no auto-cut off so overfilling can be a problem!

Having said this I like Dum-Dums ideal of and electric PAS, might have to investigate.