1.5HP dust collection. 1 stage or 2 stage?

[Tom Hoppe]

Don't use a 4" collar on the exhaust side . Why would you "choke" your system that way ? That 6" fitting is $6 at Lowes . You want to get as much air thru it as you can . Try Air Cleaning Specialists ( sales rep. Chris Peanick ) . You can get a better filter for less money .

Ahh, I got that wrong, apparently it's 5".

Is this, with the addition of a 6" inlet modification, what you are planning?

Attachment 446141

If so, note that the outlet hose is 5" so you will want a 5" collar for the filter.

Based on what I've been able to glean from various videos and forum posts on the SDD loss factor I think you can expect performance similar to this:

Attachment 446142

That's exactly what I was planning and was the picture that I used to plan my build. I did get my numbers wrong, thanks for the beta.

So I need a 5" collar for the air filter, and then a 6" to 5" reducer for the top of the SDD to HF inlet and a 5" to 4" reducer as well for the inlet of the SDD.

[David L Morse]

So I need a 5" collar for the air filter, and then a 6" -> 5" reducer on the SDD and a 5" to 4" reducer as well for the inlet of the SDD.

No, modify the inlet to the fan. Make it 6" and use 6" hose or pipe between it and the SDD. Isn't that what the 6" collar is for?

Also, don't use 4" duct. Use 5" snaplock or spiral. No need for 5"/4" transition.

[Tom Hoppe]

Ok, cool, I'll do that re: 6" collar. Was wondering if it was better to modify the inlet, or do a reducer.

And you're saying to use 5" duct from the SDD inlet to my tool, and then a 4" reducer on the tool itself? All my tools have 4" dust ports. I was planning on moving tools and moving hose between tools, so I do need flex hose.

[David L Morse]

Ok, if you're using hose between the tool and cyclone inlet definitely use 5". If all your tool ports are the same size then just put the transition on the end of the hose and use it as a connector.