How do you modify a routing preference to choose certain fittings? We have DWV routing prefernces but they always use sanitary tees. My preference is to use combination eighth bend wyes, I don't want to have to put them in manually.
Is there a way to choose what fitting are selected by default? Similar to the way ACAD MEP is setup with pipeprefdef?
If you always want your DWV system to use eighth bend wyes, change the routing preferences in the type properties of the pipe:
If you'll ever need to use a pipe type with sanitary tees again, I'd recommend creating a new pipe type that uses eighth bend wyes so you can go back to sanitary tees easily (by using Change Type) with the pipe run selected.