Fulton4 inch to 2 1/2 inch Reducer Fitting for Dust Collection Hose to Hose Connections and 4 Inch Port Connections on Larger Machinery

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When I see 4" to 2 1/2" reducer I understand that to mean that it will fit on (either inside or outside) an existing 4" connection and also connect to an existing 2 1/2" connection. That means that either the inside diameter is less than or the outside diameter is greater than an existing connection. Normally for these it would be sized so the inside diameter is 4" so it fits outside of the existing 4" connection and then inside the existing 2 1/2" connection. This piece does NOT connect!

So many BIG tools and devices use 4" but my small shop mostly needs 2 1/2" or smaller. This transition works well because it is tapered. I use it to transition from the big gulp under my table saw to the 2 1/2" hose further down the line in my system. It seems to easily keep suction even with the reduction in size.Some dust collection parts are interchangeable with plumbing, but most sizes don't match up, so when you need a specific part you have to pay the freight and get a true dust collection fitting, like this.

I bought a new saw that didn't have a 4 inch dust collector port. This was perfect. It accepts a 2 1/2inch hose inserted the same way you would insert a brush or a blade fitting on a shop vac. It's a male 4 inch fitting with a female 2 1/2 inch fitting. Well made, works well.

This 4" to 2 1/2" connector piece is just as you would hope. It's a nice hard plastic with the male end dressed in a chamfer. It's reasonably priced, on Prime, was as described and came on time. So cool!