Revit MEP

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Posts: 772
Registered: ‎08-10-2009
Message 1 of 6 (307 Views)

Sloping Waste problem

307 Views, 5 Replies
11-15-2011 01:18 PM

Has anyone had as much trouble as we had routing SLOPING PIPING?  I have back-to-back bathroom groups.  The "Wye 45 Deg Double - PVC - Sch 40 - DWV" does not like us!  One of our guys spent 5 hours today trying to get one group to connect and slope properly.  Do you start upstream and work downstream?  I never had such a problem with this before.

Product Support
Posts: 395
Registered: ‎06-27-2010
Message 2 of 6 (297 Views)

Re: Sloping Waste problem

11-15-2011 03:54 PM in reply to: asommer

If the branch is connecting in the wrong direction (as in the screenshot), try using the Wye 45 Deg Reducing - PVC - Sch 40 - DWV.rfa family instead.





Chris Aquino
Technical Support Specialist
Customer Service & Support
Autodesk, Inc.

The Revit Clinic
Distinguished Contributor
Posts: 134
Registered: ‎03-10-2004
Message 3 of 6 (282 Views)

Re: Sloping Waste problem

11-16-2011 09:30 AM in reply to: asommer

I feel your pain since I too have been fighting connections on waste/vent piping in 2011.  We have been using the family "Tee Reducing Sanitary - PVC - Sch 40 - DWV" and it has been ok for most instances, but I too have had the same issue you/your team have run into with the reversed fitting shown in the other response.  Sometimes, it was easier to reroute the piping than trying to get the fittings to work and thats just not right. Also, there needs to be a way to rotate a fitting by other increments than 90 deg.  Setting a section is just plain tedious


Man, feels a little better to vent! 



Distinguished Mentor
Posts: 772
Registered: ‎08-10-2009
Message 4 of 6 (265 Views)

Re: Sloping Waste problem

11-17-2011 10:59 AM in reply to: RKLindner

I had that issue where the fitting is reversed, I can get past that.


My issue is that I have a bathroom group that has branches for fixtures that are close together.  I place the "Wye 45d Double in the horizontal main.  then, I route a branch from the fitting upstream, do a 45d bend to the fixture (a floor drain, in this case, please see attached).  I go back and select the horizontal pipes to check the slopes, and it changes the slopes from 1/4"/ft to something goofy.


Also, if I bend too close to the fitting, it says "no auto route solution found".  There is plenty of room for the bend, this does not make sense.  So I go WAY PAST where I need to bend, do the bend, and try to move it back.  I have to draw a line from the floor drain to have something to align with.  When I move the branch back, I cannot snap to the line.  If I "ALIGN" the branch with the line, It changes the slope.


I try to draw lines to give something to snap to when routing the branch, my pipes won't snap to the line.

Distinguished Mentor
Posts: 530
Registered: ‎09-29-2008
Message 5 of 6 (257 Views)

Re: Sloping Waste problem

11-17-2011 12:34 PM in reply to: asommer

There is no answer. This is just the way Revit works. Fun huh? I love spending 4 hours on something than just giving up, because Revit just wont do it.

If I absolutely have to and I mean absolutely have to slope pipe...I still wont do it.

Let the contractors do it. For MEP with ever changing backgrounds it's a waste of time.

"It's hardware that makes a machine fast. It's software that makes a fast machine slow."

Distinguished Mentor
Posts: 772
Registered: ‎08-10-2009
Message 6 of 6 (245 Views)

Re: Sloping Waste problem

11-18-2011 07:26 AM in reply to: Jrobker

Yeah, that's been the answer for quite a while.  I just love when I tell the boss "oh yeah, we can do that, Revit can do that", and then suddenly it won't, and I have to fake it and do it in cad.  It causes a great loss in faith until next year's release.

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