Redoing dust collection

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Forum topic by CWWoodworking posted 11-09-2018 03:15 AM 508 views 0 times favorited 3 replies Add to Favorites Watch
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811 posts in 959 days

11-09-2018 03:15 AM

I am hoping I have a little time over Xmas to re-due my dust collection.

I have added and redone so much the last year that I am currently just hooking a flex hose to what I’m using just to get by.

My dust collection machines are a 2 hp grizzly and a wall mount grizzly.

The wall mount is hooked to chopsaw station and not really looking to do anything different there

I would like to take the 2hp and hook it up to 3 machines-

Vertical panel saw
Table saw
Drum sander

All of these machines are extremely close to each other and looking for ideas on how to make it flow.

This is my somewhat crazy idea. Mount it high on the wall and vent it outside instead of bagging it. Being up high, it would take up less space, and I wouldn’t be tripping over pipe/hose. I could vent it into 90 gallon toters I already have(5).

The vertical and sander connections are on top anyways.


3 replies so far

View Fred Hargis's profile

Fred Hargis

6258 posts in 3274 days

#1 posted 11-09-2018 11:36 AM

I’m guessing this is a single stage DC (?) and you want to vent the discharged dust and chips into the totes? I would bet that isn’t going to work very well…the air still has to escape and will carry a lot of the debris with it. If you put a separator into the system (or if it’s already there) then I’d say you’re good to go. You could set it up as planned and see what happens; add a separator after the fact if needed.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Lazyman's profile


5492 posts in 2168 days

#2 posted 11-09-2018 02:49 PM

I seem to recall that you’ll lose some suction when you add vertical runs in your system but if you are saying that you are removing the filters, that should offset the reduction. If you won’t have a separator at least, you are going to have quite a mess outside your wall, not to mention annoyed neighbors if they are nearby.

Also, don’t forget you will need air coming back into the shop to replace the theoretical 1700 CFM of the 2HP Grizzly you’ll be venting out. In winter months, this could make it impossible to heat your shop effectively if you run the dust separator frequently or for long periods. For example, if you only get 1000 CFM, that will replace the equivalent of all of the air in a 20’x20’x10’ shop every 4 minutes.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View pintodeluxe's profile


6160 posts in 3594 days

#3 posted 11-09-2018 04:37 PM

I wouldn’t vent outside unless it’s a cyclone.

Vertical drops are no problem. Just hard pipe it with 6” metal, then reduce to 4-5” for the drop. Keep the curves gradual with large radius where possible. Limit the use of flex hose to a few feet per machine.

Once you use a hard piped system, you’ll never go back to hooking up one machine at a time.

Not sure how fancy you want it, but I’ve had good luck with iVac and Grngate automatic blast gates.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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