dust collector piping

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by pauljuilleret posted 09-02-2014 09:32 AM 859 views 0 times favorited 6 replies Add to Favorites Watch
View pauljuilleret's profile


71 posts in 1073 days

09-02-2014 09:32 AM

Last week I had the Harbor Freight 2 hp dust collector follow me home. Sense then I have been pondering on what size ducting I should run for this machine. I’m leaning toward 5” I will be ordering the Winn nano filter for it today. so far it’s still in the box as I want to have all the needed items rounded up first. I”m also thinking of either the Super Dust deputy or a top hat ahead of the dust collector I want to try to do this only one time not by having to try something only to have to re do it as it didn’t work properly. Any input would be welcome.

6 replies so far

View BTimmons's profile


2298 posts in 1905 days

#1 posted 09-02-2014 06:02 PM

I’m no expert on DC stuff, but I seem to remember most folks use 4” pipe on that unit. Apparently it takes a more powerful machine that pulls more CFM to move the extra volume of air that a 5” pipe would contain.

Anyone please correct me if I’m wrong.

-- Brian Timmons -

View ChrisK's profile


1794 posts in 2502 days

#2 posted 09-02-2014 06:23 PM

4” will help keep the air velocity up. That is what carries the dust to the collector. If the air velocity drops to low, the dust will fall out of the air stream. I am sure there are online calculators for hose dia, length, cfm, hp.

-- Chris K

View derosa's profile


1568 posts in 2256 days

#3 posted 09-02-2014 06:28 PM

Only real issue I recall with 5” is finding affordable pipe, it shouldn’t have too much trouble with that size and is the size of the opening for the blower. The filter will reduce a restriction and help it to flow the 5” better. Biggest issue will be how far you’re running the pipes.

-- --Rev. Russ in NY-- A posse ad esse

View buildingmonkey's profile


242 posts in 968 days

#4 posted 09-03-2014 02:44 AM

You can use S&D drain pipe, it is available in 4” almost everywhere, and in 6” some places. It is the least expensive of the plastic pipes you can buy, and they have fittings that match. It has a bell on the end so you can use it without couplings. Strong enough for dust collection, you really don’t need schedule 40 or sdr 35. The S&D costs a LOT less. If you don’t find it at the first home center, check with another. Menards stocks the 4”.

-- Jim from Kansas

View pauljuilleret's profile


71 posts in 1073 days

#5 posted 09-04-2014 09:54 AM

Thanks for your input on this I’m debating on if I should park it in one area and duct it to my equipment or I found where kdc68 had built his harbor freight along with some other modifications on a movable cart. his idea looked so good to me that I am now leaning towards that route also. My Winn Nano filter should be here the first of the week then I can figure out for sure it’s good to know that on this site, if someone has a question many answers will follow once you ask.

View TheWoodenOyster's profile


1275 posts in 1355 days

#6 posted 09-04-2014 12:17 PM

Keep in mind that if you put a cyclone or top hat in your system, you are going to lose some static pressure. That said, you might want to consider keeping your runs pretty short. I bought that DC planning to hot rod it up with a wynn filter and a top hat. I ended up just leaving it stock because of numerous comments warning about loss of suction over extended lengths. I decided to use this DC as a temporary solution until I get into my permanent shop where I can set up a whole system. So, If I were you, I would keep the runs short, which may mean rolling the DC around the shop to the machines as you use them. I do this now, and while it takes a couple extra minutes, it’s not too bad. You get way more suction and you won’t have to pay for and install all that piping. 5” piping is going to be way more expensive than 4” options. Either way, a large ducted system with blast gates and such will not be cheap, no matter what you use for ducting. I’d strongly consider rolling it around, at least for a while. If you don’t like it, you can splurge and put in a big ducted system.

-- The Wood Is Your Oyster

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics