The inner hole of this filter is larger than the Omnifilter (or Brita). This means the filter is not lightweight fits on the B pillars bottom or top which makes installation quite tricky.I think the washer is in the right place if you install it right so I tried a couple of times but couldn't balance it.exactly the right spot AND a screw in the body.When I thought I had it I wiggled the housing and the filter wobbled noticeably so it was clear it wasn't installed properly.For various reasons I replaced the Omni with a Brit replaced and see it's the same design as the omni so this filter won't work with it either.I read a review that said the gasket didn't fit but there it's listed as compatible I figured the reviewer shouldn't have tried it or something so I don't care went and bought it. Pooh!