Creating new routing preferences and catalog

I have been tring to create new routing prefences but I need to make changes at default ones. If I explode the original one then how can I save them again as fittings?.

If i find them as 3d drawings, how can I turn them to fittings? I know how to create mvparts but not fittings.

thanks

Fittings are parametric parts. That's a whole new world of AutoCAD MEP content customization and can be very complex. Depending on what you're wanting to do, you might only have to edit the existing catalog of parameters to get your desired results.

Might I suggest this book as well: http://www.amazon.com/Mastering-AutoCAD-2010-Paul-Aubin/dp/1439057664

If you're really wanting to dive in deep with AutoCAD MEP, then that's the book that will get you where you want sooner than any other book available.

I have already that book and I have already read that book but I know how to create parametric parts but it explaines just to draw parametric parts. but I found 3d drawings. How can I add them as fittings? I know how to create mvparts, or parametric parts but as I know we need to draw it by ourself. Thanks

where is the information of the parts that says cast iron,pvc? Is there a way to change these properties?

where is the information of the parts that says cast iron,pvc? Is there a way to change these properties?

I HIGHLY recommend backing the *.apc files up before modifying any of these catalogs. Have fun.