I never did it once when I was RO. Switched to filling the tank from the tap and DI'ing on the way out and because it's so much faster, I get caught out all the time. My family think I have lost it because I jump up and run out the house when I remember it's still filling. Twice, passers by have knocked on the door to tell me there is water gushing from the van. If I do it again I might pop!