Five years later, Workshop Remodel. Going from pretty to functional #10: Update on dust collection via water filtration

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Blog entry by Craftsman on the lake posted 04-23-2014 02:05 PM 1602 reads 1 time favorited 8 comments Add to Favorites Watch
« Part 9: The Assembly/Outfeed Table Part 10 of Five years later, Workshop Remodel. Going from pretty to functional series Part 11: Connecting, hanging, and shrinkng dust collection pvc »

I’ve got the dust filter up and running. My method is a bit unorthodox but so far it seems to work. I previously wrote about how I was planning on building it and the theory behind it. Now it’s up and running in an experimental mode. if it seems to work out I would better finalize the filter to make it easier to empty and recharge with water when needed.

Photo from a previous blog describing function: A video of it up and running with mods is below


A little backstory. I have a delta 1 hp dust collector. It actually does a good job sucking the chips from my planer, jointer, and router table as long as I have a short run and use one at a time. But the cloth bags passed the dust through. I replaced the bottom bag with a heavy duty rubber trash can and the top bag with this water filtration system. I will say though that no matter what I do, getting all the dust to go into the collector is another obstacle. It gets most of it but what gets away from it at the tool end is still an issue.

Here is a link to a couple of blogs back in this thread to when I better describe it.

And a link to the video in case the one below doesn’t work for you here.

-- The smell of wood, coffee in the cup, the wife let's me do my thing, the lake is peaceful.

8 comments so far

View grizzman's profile


7598 posts in 2300 days

#1 posted 04-23-2014 03:31 PM

i hope this works for you, you have been pretty creative with this so far,

-- GRIZZMAN ...[''''']

View doitforfun's profile


199 posts in 604 days

#2 posted 04-23-2014 09:02 PM

Aren’t you worried about humidity? That must add a lot to the air. I’ve seen similar setups for clothes driers when there is no vent. They are a fire and mold hazard, but your setup isn’t making heat so the water won’t evaporate nearly the same way. Another possible method would be to simply submerge the DC outlet pipe in the bucket. That would probably have a big impact on the motor but it would force the dust straight into the water guaranteeing all of it get submerged and collected.

-- Brian in Wantagh, NY

View Craftsman on the lake's profile

Craftsman on the lake

2492 posts in 2434 days

#3 posted 04-23-2014 09:13 PM

Not a whole lot of humidity issues here in Maine. I thought of submerging the pipe but three things stopped me. One is that it would impede the flow of air. Two, the air would blow out in large bubbles and the dust would probably manage to escape better. And three, the force of air would probably blow the water out to the ceiling. It comes out pretty fast. With multiple thin sprays of water that the dust has to go ough, I don’t see how the dust can not mix with the water before the water falls into the tub.

-- The smell of wood, coffee in the cup, the wife let's me do my thing, the lake is peaceful.

View gfadvm's profile


13538 posts in 1686 days

#4 posted 04-23-2014 11:40 PM

This is a fascinating idea! Keep us posted and a video of it in action might be interesting. I too had visions of it blowing water up like “Old Faithful”!

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View pintodeluxe's profile


4018 posts in 1809 days

#5 posted 04-23-2014 11:47 PM

Nice system, looks great.

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

View woodchuckerNJ's profile


993 posts in 630 days

#6 posted 04-24-2014 01:34 PM

Dan, good idea, but let me comment on your plumbing.
You are killing your dust collection with that first WYE. its not a good wye to use.

First use a real wye second lets get rid of it going both ways.

if you put the wye verticaly then a slow turn 90 above it, you can branch both directions and have better suction. Right now you are asking the air to make a huge change in direction and with the 1hp it just doesn’t have the static pressure to pull that well around the corner.

Your solution reminds me of my dry wall sanding bucket, but you have a good solution as I don’t think you are inducing a drop in pressure. if the pipe was in the water you would drop the pressure and that 1hp would not function well enough.

I would change it from 4” outlet to a 6” outlet above that, so you slow the dust down, and the hose you have up there is not consuming the 1 square inch of valuable space. 6” will slow the dust, and that 1” won’t be noticeable.

Good luck.. BTW add a drop of bleach in there. I have a sink in my shop that recircs water since I don’t have running water. the bleach a capful at a time avoids the greenies and mold. More water will help too.

-- Jeff NJ

View Craftsman on the lake's profile

Craftsman on the lake

2492 posts in 2434 days

#7 posted 04-24-2014 01:52 PM

Thanks for the comments.
If you mean the T at the top.. Just one machine comes from the right. All the rest are on the left.
right now the air comes out with tremendous force and pull chips in when held in my hand about 6” away. I agree about the 6” but the difference in price between the two was such that I just wouldn’t give them what they wanted for elbows at that high cost. I’m a little weirdly frugal like that. Please keep in mind though that if it did greatly impede the flow I would have sprung for it. I’m frugal but not cheap… well not that cheap anyway.

I do have a little chlorine in the bucket. Won’t do too much good if I don’t add more each day as it evaporates from water quickly. The reason people in cities put pitchers of chlorinated water in the fridge. It’s gone after a few hrs but does kill bacteria that’s there at the time.

-- The smell of wood, coffee in the cup, the wife let's me do my thing, the lake is peaceful.

View woodchuckerNJ's profile


993 posts in 630 days

#8 posted 04-25-2014 01:35 AM

Dan, you only need 6” where you have the water tubing. So not all the way. It will cause the dust to slow, and lower the force too. That way you have more chances to make the water bond to all the dust. Hopefully its a mist in there. Slowing it down will lower the output pressure too.

That one tool is suffering, try putting your hand near the opening of that machines port. Then do the same for the other. You should feel a difference. Probably a perceptible change.

-- Jeff NJ

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