Truma Ultraflow water inlet hose

It would seem you have answered your own question.

i would use a stainless steel nut that either fits over the pipe or plastic cable tie it in place.

I have read that some slide a cut length of 2" white PVC plastic pipe, and slide it over the pump and hose before dropping it in.

Trauma Ultraflow pumps are horribly inflexible and prone to kinking. I have changed mine for a Whale pump which has the Ultraflow pistol grip connector and is extremely flexible and user friendly.

remove filter then slide a clean piece of domestic waste pipe onto the hose, re-attach filter - no more problems of inlet hose floating in aquaroll

Thanks for all your suggestions - I'll try the plastic pipe.

I did the same as JohnM .... a far better product.

I simply do not push more hose than is needed into the aquaroll and so it does not turn back on itself. 

Not always easy to do due to the rigidity of the Truma hose

never had a problem. just move aqua roll a bit further away from van when pump touches the bottom. I always lift pump up and down a few times to remove any air before connecting to van.