We recently purchased a 2012 Winnebago Adventurer 32H. As it was winterized there is no water filter cartridge attached under the kitchen sink. The Winnebago Industries site gives a part number for the whole filter unit: 160946-01-000 for the our motorhome.
I'd like to know make and model # for the filter holder so I can purchase a filter cartridge that fits and works effectively.
When I googled the part number you posted, I get this data sheet from Winnebago... WATER SYSTEM 175909-01-000. I see a filter listed there and it's available from Amazon. (Not sure if it's the one you need but maybe you can tell by looking over that info sheet.)