It's the Carlsbad, California number in the manual. Sorry everything I have is out of house right now due to flooring being replaced Monday. A few others on here called them and got mixed results as well. Depends on who, what, how you talk to them, I guess?What number did you call? When I called they told me I would have to take up the issue with Leslie’s directly and would need to purchase it from Leslie’s.
Basically, I said it wasn't working for the job I purchased it for. That all the dust is still in the bottom of pool no matter how many times I run it. The guy I spoke with did mention something about Leslie's should have told me about fine basket, and I replied, this is my first robot I don't know about that thing. Good luck.