Product review (1 stars): Pure junk
I hate these filters with every fiber of my being.  I'd rather walk down to the river with 2 buckets and a yolk than have to rely on these filters for drinking water.  But, alas, this is fridge that we're stuck with.  Let's put aside the absolutely ridiculous price being charged for a handful of charcoal, it's the functionality that really gets me.  Every production run of these things (from various manufacturers) seems to get worse.  It's now nearly impossible to purge the air from the line.  Installation is supposed to be simple: insert then twist half-turn.  But what you get is air in the system that reduces water flow at the dispenser to a trickle.  What you then have to do is turn the filter back the half-turn, do not remove it, then turn it the half-turn again.  And don't forget to mop up the fridge shelf every time it spews water everywhere.  This hack has been working up to a point.  Now that's not even working.  And it's not the fridge connection (o-rings).  If I put the bypass cap on instead of the filter, there's no flow problem.

Unfortunately, by this time, if you're looking at this filter, it's because you already have a unit that requires it.  So you're stuck like the rest of us sorry suckers.