Although I can't see you breaking any laws, I bet the council won't be too charmed. Everytime someone sees water running down the road they will report it as a leak and the council will be obliged to send a contractor out to investigate, even if they know about you already. I wouldn't do that if I were you - opening a can of worms, water meters, running a business from home etc. etc.
Isn't there another drain, either storm water or sewerage somewhere else? It doesn't have to be close by. Is it possible to rig up a your r/o on a stand and rig it up in either in the bath or kitchen and just couple it up to fill the van. There was someone on here that ran a small plastic pipe through a hole in the wall, down a couple of floors to his van below. You may be able to get a plumber to fix a permanent pipe on the outside of the wall if the owners of the flats agree. I know of a window cleaner who prepares water at the back on his terrace house and runs the pipe under the house to the front, where he fills his van.
I run my waste to the back of the house. The easiest drain to get to is in the front, but prefer to keep the knowledge of waste water amounts away from the neighbours.
Thanks for trying to advise on a solution Spruce,
The thing is I already have the best solution, unfortunately my neighbour continues to give himself sleepless nights worrying needlessly. I already have as you suggested the waste fed through my rear wall and into a downpipe and the pure goes under my floorboards and through my front window frame down to street level where I join it up to the van by a short length of hose when I need to fill.
His issue seems to be with the hose connection that feeds the ro from a mains tap in a communal hallway, this cannot be permanently connected (and there is no other permanent means of mains feed within my flat because the mains supply is hidden behind walls )
I'm sure he is just trying to be helpful by suggesting we install an outside tap so my equipment can be van mounted and tbh I'd prefer that as I am so short on space, but without an available drain for the waste I guess its a no go.
Thanks for the help though, Simon.
Colin purewater, if you are still reading this thread I'd be interested to know what happened once you were reported to the water board ?