Revit MEP (Piping) cant design pipe, flow = 0
This part of SV2 has been completely disconnected from the other part.
Remove the caps and rejoin the two parts of the system.
You've capped off the system at the source end - remove that cap.
This part still seems to be in a loop:
I split the pipe, removed the union fitting which resulted and capped the two ends:
Flow now propagates all of the way back to the source:
Pipe sizing now also works BUT it gives errors because the resultant very large pipes and fittings break when there isn't enough space for the larger bends/tees. This will be partly due to your use of Preset connectors rather than Fixture Unit which is resulting in very large flows and a lot of 110mm pipes.
I would again suggest that you use the Fixture Unit method for plumbing systems since it is completely unrealistic to base the design on every fixture discharging at full flow simultaneously.
I've attached the amended file. There are some problems with your other systems as well but I didn't alter them.
Im back @iainsavage 😄 I look into your advices and repare the whole model. Model was calculating whole system for cold and hot water. But as you said, it has ridiculously big pipes :D. So I start to do the Fixture Unit method, read the article you send and set all fixture units to the right setting. Result is, that cold water is mostly calculating, but hot is not, and I dont know why.
Cold water is also 0l/s it some places. (I set yellow filter for it like u did). Also dont know why.
Reciclutaion water is 0, because is disconnected, I will calculate it in the end like you said so.
Also, I want to ask, in the end a want to connect the systems together, I read on some forum thats it is possible with corrrect family. Isnt it?
THX
There is mention of this in one of the links that I gave you and there are also other posts on the same topic.
Revit only offers the IPC method. The only user controllable choice is whether your system has "predominantly flush valves" or "predominantly flush tanks" - second option gives lower flowrates.
This has been a constant frustration for me since I am in the UK but even some of the US based contributors have queried the use of the IPC because it doesn't meet their needs or their local building codes.
The only other options are to create your own calculator addin (if your proficient in C# or Python), or you find a way of adjusting the FUs so that they convert to sensible flowrates to suit your own code (I think there's a post where @HVAC-Novice has done something like that).
I found one addon in the Autodesk store which seems to use the DIN code but I haven't tested it for accuracy/reliability (I assume Autodesk have verified it since it is on their store) but it doesn't seem to be upgraded and only works up to version 2019.
Some of your plumbing fixtures are disconnecting from the piework because there is not enough room for the bends and reducers etc.
I've corrected this one for example:
The hot water out and cold water in connectors on the water heaters should be Instance, not Type, so that they can vary their values depending on what is connected. They also need to be linked by a formula.
It doesn't seem to like the two water heaters connected in parallel - I tried changing the connectors to System with 0.5 flow factor but without success.
