What is a "plain end" fitting in pressure networks?

[mermerCAD]

In this Autodesk Knowledge Network article about why pressure pipe runs break, it says one cause is "using plain-end Fittings to connect between Pipes".  What is a plain-end fitting?

https://knowledge.autodesk.com/support/civil-3d/troubleshooting/caas/sfdcarticles/sfdcarticles/Unsup...  

Thanks so much!

Meredith Chamberlain

C3D 2022.2

[paul.kazmerzak · Accepted solution]

Well, I don't know about the C3D world, but in the real world, a plain end fitting is when the end of a pipe has the same size OD on both ends.  Compare that to a "bell end" pipe that has one larger end that fits over the smaller end of the previously installed pipe.  Plain end fittings require a coupler to join to other plain end fittings.

[mermerCAD]

Thank you @paul.kazmerzak !  That is exactly what I was looking for.  Now things make more sense to me.

I really appreciate your help!

Meredith