Flat Oval Spiral Duct Observe the underneath video to begin to see the installation of oval duct and fittings. Recognize that the reducer getting used is undersized on its collar enabling the oval duct to slip over the collar. They are working with Unistrut with threaded rods as hangers to https://round-conduit46678.win-blog.com/17369199/the-5-second-trick-for-round-conduit