If you don't get any responses from a 2400W owner, I suggest you look in a cabinet near where the city water port is on the outside. It's usually immediately behind the city water port.
We have Sunseeker 2400 MBS WS. Ours is under BR sink. The filter itself has no identifying numbers letters anything but we found replacement that "looked like it at" Walmart. Hope it is correct one!?!
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used to be - Full time 2016 Sunseeker 2400WS towing a 2018 Subaru Forester. 2021 we bought a house.....Still have the precious Sunseeker and tow car.