if you grind it up, little pieces are gonna fall through until you have some resin built up in your pipe if you're super concerned about it, buy a screen and use it or something...glass screens are great!! a lot of screens have a weird taste, but you don't get any taste with glass screens, so if you want to use one for your piece (although i don't think it's necessary, and i can't think of a time i ever used a screen in my glass pieces when i smoked weed...the only time i did was for salvia), i would recommend a glass one just don't forget it's in there and throw it away

edit: lol i was typing my post up and posted it just a minute after nochowderforyou's post...lol so it contains some of the same info
blazed_babe Reviewed by blazed_babe on . Glass use Is it common practice to grind up your weed before putting it in a glass pipe. When i did that, some pieces fell through the hole. Does anybody just put the whole bud in there? Rating: 5