Dust Collection Rough In

[brianpgriset]

Having my slab poured in a few weeks for a new shop. I am planning on putting two 4" dust collection pipes in the floor for table saw and planar. I want the PVC in the wall. Walls will be 2"x6", so that doesn't leave alot of room for error.

I've never done this before, so this might seem obvious but I'd think it's worth asking; I should have the 4" PVC stub up in the middle of the wall right? 3/4" isn't alot of room for play.

Should I move to 3"? Or just not come out of the wall? For those who did similar (in floor dust collection to wall), how did you do it?

 

[Black Oak]

You can only have a modest DC system w 4" ducts . 6" is better almost always . I don't know what you are planning , but burying 4" ducts in the wall , you'll only get so many CFM thru them . I wish you well .

 

[brianpgriset]

My woodworking is limited and i dont have plans for a big setup. The plan is to get the stuff in the floor that I really want clear span for, especially the table saw.

 

[starckie]

I second moving to a 5" or 6" pipe, cheap to future proof now (unless your DC is too small to handle it). For instance a 6" pipe would allow you headroom to do dust collection at the cabinet and above the blade.

Will your plan allow you to exit at the floor? It sounds like you are already going to have 2 90ø corners and stubbing it out of the wall will add a 3rd and maybe 4th 90 to the mix. Coming up from the floor may allow you more room to make some less abrupt corners on the way to the DC.

Bill Pentz probably has the most exhaustive research on dust collection on his site if you want to go down the rabbit hole

http://billpentz.com/woodworking/cyclone/ducting.php#ducting_introduction

Good luck

 

[mike93lx]

Do 6" and have a bump out in the wall for it. You can't change what is in the slab later on and you can always neck down to smaller piping to connect up.

Planer shavings are very bulky. Clogging a pipe buried in a slab or wall is going to be a PIA to clear. Bigger will help prevent that

 

[machsnell]

Definitely go in floor. I wish I had. Smart move to do so now.

As other have said go 5 or 6 inch unless you really aren't doing much woodworking at all in which case 4 inch is fine. Much better than 2 or 2.5 of reg dust deputy style shop vac.

Definitely read bill pentz info.

Grounding pvc, airflow, fine particulate etc.

It is a rabbit hole however.

After starting I ended up going 8 inch to 6 inch drops and a 5 hp vac and so on. And I don't even do that much wood work.



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[Black Oak]

My woodworking is limited and i dont have plans for a big setup. The plan is to get the stuff in the floor that I really want clear span for, especially the table saw.

What kind of dust collector will you be using ? As mentioned above , planer shavings in a 4" pipe will be a problem .

 

[dcg9381]

I haven't used these systems, but the ones I've seen are 4"+. Honestly, I think it's kinda cool to have the "industrial" look and run ductwork externally (I just paid to expose ductwork on an apartment). It's also an issue for maintenance and future changes.

If you're going to run through walls, I think 2x6" is too close to 4"... (l'd need to reference the code). I'd consider doing a fur-out if I was going to do it...

 

[mike93lx]

How high is the ceiling? Going up may be more practical and certainly more flexible

 

[Toolfool]

In my previous shop I ran 6" DC, air, and electricals under my slab to most of my planned machine locations (see my shop link). The more 6" pipe your run before reducing down to machine connections the better your system will work (as stated, unless you're running a tiny motor). Bill Pentz's site is a must read before deciding on DC size, pipe, location. Good luck with your build. Post pics.

 

[Black Oak]

How high is the ceiling? Going up may be more practical and certainly more flexible

Exactly !

 

[mbatarga]

For my table saw, I had a trough about 12" wide and 8" deep formed for my slab poor. It's got a ledge along the length and is covered with 3/4 plywood across the floor. It goes from basically the "middle" of my shop floor and over to the right wall of my shop. My table saw is placed right at the end of the trough and I've fed my 4" ducting, as well as power for my saw and power for another circuit in the trough. My ducting and power exits and runs up the wall.

 

[mbatarga]

I found a picture of the trough.
This is from near the right wall looking to the saw placement.

 

[arindom]

very good...!!!!!

 

[Kaizen]

I did in floor and had the same thoughts. wanted to fit it into the wall. ended up with a bump out for the concrete stem wall. In the end i covered my walls with plywood and now realize i should have just come out on the wall surface as that is how the rest of it will be run. I did 4 inch to my tablesaw and did it so i had nothing hanging. spinning boards around with something hanging reduces usable space. Not what i wanted to deal with in my new garage.
I did zero research and used white pvc pipe. Should have at least used 4" drain pipe as i guess the fittings convert/fit better to vacuum. If you can get the 6 i'd do that but not always available locally. remember all of this is buried under the concrete and i'd recommend making a sawcut between the two ends of the pipe. i gaurentee it will crack there.

i know op is in texas but if you are in snow country and building through the winter make sure you don't hit the stub with the damn snow blower

 

[Black Oak]

Hey Brian , what have you decided to do ? Let us know .

 

[brianpgriset]

Hey Brian , what have you decided to do ? Let us know .

Current plan is to follow suggestions on 6" pipe. Will use SDR35 pvc and fittings. Available locslly at Lowes. I will alos run up along outisde of wall as suggested and just frame out a bump.

Thanks guys