2010 8526 RLWS - the water filter in my unit is behind the basement wall next to the water inlet fitting.
PITA to get to to change the filter.
Need to do that every time you winterize, so I cut out a section of the plywoord with a box cutter to gain access to the cabinet from the basement. Goind to rebuild the entire system and add a surge tank to the water pump. Also add LOTS of sound proofing. The damn thing is NOISY.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW