Bell end direction of underground pipes Post date Home › Forums › Sitework › Underground utilities › Bell end direction of underground pipes This topic has 0 replies, 1 voice, and was last updated 5 years ago by atuter. Viewing 1 post (of 1 total) Author Posts September 3, 2018 at 7:11 am #335 atuterKeymaster During underground pipe installation, make sure that the bell ends are at the upstream side. Sounds simple but it is really important and easy to miss during the rush of things. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In → Earthwork