Don't ask me...I'm having TERRIBLE problems with my Dolphin Dynamic and I don't have a drain. Maytronics' rep in the US, Smart Pool, had my unit and claimed there was nothing wrong--but it won't move around my pool.

At this time I have to say that given my experience and the experience of a number of posters, I personally do not see myself ever buying a Maytronics product again. Not only did it fail after far too short a time, but their service to this point has been unacceptably atrocious. Things DO break down. It does happen. But how it's handled is also part of what you buy.