12-20-2012, 09:32 AM
My 90 has the newell factory installed macerator on the passenger side of the tank. That is the only reason I would use that side was if I was putting a macerator on and I would probably take the air valve off anyway. Tom
2002 45'8" Newell Coach 608 Series 60 DDEC4/Allison World 6 Speed HD4000MH