To be honest, I have never found that any of the filters from any of the manufacturers work for more than 24 hours before getting clogged up and from talking with numerous other ostomates, they feel the same way. They may last a tiny bit longer for colostomates whose output is less watery, but for ileostomates, 24 hours seems to be about
the absolute limit.
I use a one piece and just
open the tail end to 'burp' my appliance (can even do it while lieing down in bed). I've heard many people say that you can't burp a one piece but you really can :) Most of them say to burp a two piece from the neck end but when I tried, I ended up in a mess but have never had a problem burping from the tail end, so I guess it's really what you become used to :)
I will add that I have heard good reports about
the Osto Ez-Vent system - http://www.flat-d.com/ostoezvent1.html
from many people. It might be worth a try (I have to say I've never tried them myself because, as far as I know, they're not available here in Australia).