4" vs 6" dust collection

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Forum topic by jimmyhopps posted 03-21-2014 12:21 PM 618 views 0 times favorited 6 replies Add to Favorites Watch
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144 posts in 1068 days

03-21-2014 12:21 PM

I need to rerun much of the duct tubing in my shop. It is all 4” today, but was thinking of making some of the new main trunk at 6”. However, the main trunk will not be able to run all the way back to the vacuum at 6”. Ie, after the 4” connections from the shop machines, there will be about 20” of 6” trunk tubing before it will have to down convert to 4” to navigate the last 20” to the vacuum). Do you all think this makes sense to do, or just go with all 4”? the vaccume i am using is the HF unit.

6 replies so far

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13773 posts in 1364 days

#1 posted 03-21-2014 12:28 PM

Only switching out the “middle” of the runs to 6” won’t improve performance. I wouldn’t waste my time with that non-upgrade.

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

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365 posts in 1131 days

#2 posted 03-21-2014 12:30 PM

Won’t do a thing. I’m also not sure the HF is capable of supporting 6” runs. I’d leave everything as-is.

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Shawn Masterson

1262 posts in 638 days

#3 posted 03-21-2014 03:32 PM

you’ve got to have serious power for 6” lines. anything under 3hp and a 14” impeller really needs 4” to perform its best.

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Fred Hargis

1891 posts in 1183 days

#4 posted 03-21-2014 03:52 PM

+1 for the waste of time/effort/money.

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

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3458 posts in 1660 days

#5 posted 03-21-2014 05:42 PM

The 6” section will fill up with dust over time to equal the size of the 4” connected to it. Don’t do it. The HF will work fine with a 5” pipe, or a 4” and a 3” connected at the same time.
A 4” reduces the volume somewhat, but not too bad with a short run.
A 6” reduces the velocity somewhat, but would help a long run.
Don’t run 6” pipe vertical with the HF as you may have drop-out.

edit. For what it’s worth, I add that a pair of 4” pipes would have about the same characteristics as a single 6”.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

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144 posts in 1068 days

#6 posted 03-28-2014 05:08 PM

thanks all

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