I've never used one. But I've cleaned ALOT of old pipes that had filters. They were gummed up, nasty, stinking(literally) messes.. that's one of reasons I use surgical gloves when I clean pipes. That and I don't know what killed the person that smoked em before I got em
Ever had a pipe gurgle. That's spit going down into the hosel. That gets caught up in the filter along with moisture from the smoke and tar . I don't see how you'd be able to get a draw after a couple bowls. You don't inhale pipe smoke like you do coffin nails. (Well, most people don't). So what's their purpose other than to cut the amount of smoke, dull the taste and catch your drool.. don't know
useless bits of rolled paper or balsa , in my opinion..
Sent from ... hey Jon, where's my damn sandwich
Think of how stupid the average person is, and realize half of them are stupider than that.- - - George Carlin