Can't you just run a 4" round to 3" round?
yes you can...but it doesn't seal as good as a true oval would. It puts a lot of stress towards to edges of the oval as it transitions to 3"
none that i've ever seen.Hmmm, any ideas where to get 4" oval to 3" round?
I just looked and oval couplers are nonexistent in this size.
No luck finding a oval 4" to 3" after a day of searching. going to have to use 4-3 round![]()
round doesn't seal as well as the oval would and could blow off.