Forums >> Revit Systems >> Technical Support >> Sanitary pipes not staying connected anymore

revit7777

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Joined: Thu, Mar 19, 2009
30 Posts

Hi everyone,I have had this issue on a lot of projects - when you start drawing up a sanitary system say you just drew a long run of pipe sloped at 1%. If I go to put a wye fitting in for a take-off it will automatically connect and be at the same slope and I am able to move it anywhere along with run of pipe with it following that slope having the pipes at both ends stay connected the whole time. But, for some reason after a day or so of working that way, Revit seems to decide it doesn't want to do that anymore. It will same as always put the fitting in properly the first time, but if I move it after that, nothing stays connected. This actually happens a lot with ductwork where it will all stay connected while making adjustments and then same thing - after about a day or so when you move things nothing stays connected anymore.To me, this seems like I must have accidentally changed a setting somewhere to make it act differently. Has anyone else had a similar issue and if so, is there a fix for it?Thanks!

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BIMConsultingService

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Joined: Fri, Aug 19, 2016
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Revit sloping piping is very finicky. The out of the box fittings are not very forgiving. Consider the case of a double Y fitting. Both connecting pipes are needing to slope up and away from the main in opposite directions away from the main. A couple small tips that may help.

When making connections to fixtures, route from the main sloping up towards the fixture not from the fixture towards the main. Determining the precise elevation the branch lines need to be at as it makes its way towards the main is nearly impossible. When making connections coming from the fxitures, often time this will adveersely affect the main.

Hope this helps.

Nick Fuller

BIM Consulting Services

www.bimconsultingservices.net 

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revit7777

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Joined: Thu, Mar 19, 2009
30 Posts

Thanks!

I was doing like you said before where I would run the pipe from the fixture to the main. It is indeed much easier like you say to run from the main to the fixture.

I also found out why the pipes stop staying connected (and ductwork too for that matter) - at some point in a project where I want to copy something and change the elevation I have to uncheck that "disjoin" box. I always thought it was by default on and you would uncheck it when required. It turns out that once unchecked it stays that way for everything else until it is turned back on. Once I figured this out everything was fine again. Good to know since like I said it had been an issue on a few projects now for me.

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