Mar 8, 2016 #1 jlippe Chemical Mar 2, 2006 3 0 0 US Has anyone successfully converted an upflow sand filter to down flow?
Mar 8, 2016 #2 bimr Civil/Environmental Feb 25, 2003 9,299 0 36 US Have done many renovations. What is the application? Upvote 0 Downvote