Different sized ports

[BT3100]

Has anyone done a top hat with a six inch to the blower and four inch to the equipment? I would like six  inch everywhere but may have to use a tapered reducer at the seperator for a while

[Dougp28704]

I am making a separator with a 5? outlet to D.C. And 4? to tools. Not a central system. I will hook up to tools individually. Is it ideal? No. But it is all I can justify money wise. I ordered the 5" tube yesterday. $6 for part, $11 to ship. I wish home centers sold 5".

[Peter]

Around here (Bend, Oregon) Home Depot sells 5" duct

But it's 30 gauge. To get 26 gauge, you have to order it from the HVAC guys.