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I use lay flat delivery hose, you can get it off eBay. To connect it to my sub pump I just used a zip tie. The only thing is it does stink I bit when you first get it , so I store it in a plastic bin in shed.
When I've filled my tank in the van, I stop the pump and disconnect the hose ( it's connected to the plastic threaded elbow using a zip tie ) I then under run the hose and empty what's left into a 25 lt container