Hi Rob
1. I dont have auto dump, but I do have a dump hose. This is very quick if its pointing to a drain or a WC. Not sure if they do autodump? Be interesting to find out!
2. What we do is when we know we have about 15 mins worth of cleaning left, we simply switch the pump off (we wanted this for flexibility and for options for draining tank etc - its a wise move!), so that the level drops and doesnt go everywhere in the van and down the side of the machine!. If we do happen to forget we have actually added silicone to the inner lip of the machine where you pour the water in. This was quite easy using cling film so it doesnt stick to the lid, wait till it dries and peel off. Quite a nice seal, and Ive never had water everywhere.
If the next job is a big one then we simply switch the pump back on when we start and leave it, as its an on demand one that auto shuts off.
3. We dont have the 2" hose as its not standard. It will take it though and would be interested if anyone is using it with this machine.
Hope this helps
Kev