We just bought a new SV250 2008 Surveyor and we were having a dickens of a time finding the water filter. After calling the dealer we were still baffeled. Well after some swearing and trying every "false" panel in the trailer we lifted the right hand tabel bench storage and tadda. Unscrewed the plywood panel and there the little sucker was.
The manual sucks so I thought I would share this tid bit for any other Surveyor owners and future owners.
Ta!