New duct added to existing problem

[Griff]

I have a section of duct and a VAV that will be removed. Then on the install drawing I am going to reinstall the VAV on the other side of a slab to slab wall. When I add a section of new duct from the relocated VAV to the existing duct the New and Exist. duct become the same phase. How do you keep them separate New and Existing?

[kyle.bernhardt]

Try placing a Duct Union on the open end of your "existing" run of duct. Then connect your new run of duct to the Union. That worked in my quick test.

HTH,
Kyle B

[Griff]

Perfect!! Thank you