Flat Oval Spiral Duct View the down below video to see the installation of oval duct and fittings. Recognize that the reducer getting used is undersized on its collar allowing for the oval duct to slide about the collar. They're making use of Unistrut with threaded rods as hangers to https://oval-conduit90345.buyoutblog.com/36491500/top-round-conduit-secrets