"If it had one and its not easy to get to I would take it out. It's simply eaiser to use an inline carbon filter on the hose connection outside the unit. Just buy one every now and then for $14 at Wal-Mart and you are done."
^^ This. If I find a filter, I'm just going to find a way to remove it permanently. I already have one of the blue filters from Wal-Mart, and I like it just fine.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!