I have a large kitchen area with 20+ Floor drains with P-traps under them. I draw a main waste line up at 1/8" per foot, take off branches at 45d, sloping everything at 1/8" per foot. I draw a pipe from the trap sloping down so I can align The trap vertically with the branch. I connect them, and the pipe shows 1/8" per foot slope.
However, If I touch the main in any way, I go back to the branch I just made and the FIRST SEGMENT of pipe coming out of the P-Trap automatically goes to a NO SLOPE situation! I changed the Horizontal connector to Sanitary instead of "Fitting" so I could check the "Allow for Slope Adjustments" setting. It still sends the first pipe flat.
This has always been an issue, Has anyone come up with a solution? Changing it to an Elbow instead of a Multiport doesn't work well with slopes, either.
Hi Revit Rule Number 27 Of Sloped Piping: Draw from the main to the branch in order to maintain the slope of all piping. Not following this annoying, yet simple rule, results branch piping at no slope. And then, when you add slope to the branch, the slope of the main will disappear, from time to time. Then, it can be easier to start over, or leave all the piping at no slope. Remember, Revit is a data base, not an engineering friendly tool. Slope, and all the calculations related to modeling a solid (yes, Revit models everything, including piping, as a solid) are difficult to coordinate in a database, to say the least. One of our consultants suggests drawing, if one can call what happens in Revit "drawing", all piping flat, that is to say at no slope, until the sloped system is complete, then highlight the system and add slope. I hate to admit it, but that also works well, too. Sincerely Scott E Forsberg C: 651-468-4024 "Sometimes the questions are complicated and the answers are simple." -- Dr. Seuss