Another DC pipe thread - Woodworking Talk - Woodworkers Forum
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post #1 of 4 Old 01-08-2011, 11:18 AM Thread Starter
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Another DC pipe thread

I didn't want to hijack an existing thread, so starting another . . .

I've read and heard not to use HVAC pipe for your dust collection system. Why? Is it not heavy enough? Will the suction collapse the pipe? Is the seam leaking a concern?

I was at a home depot yesterday, picking up a HVAC vent, was standing right next to the HVAC 6" duct pipes so took a look at the pipe and it seems like it'd be plenty strong enough. To buy the spiral 6" dc pipe, it's around $40 for a 5' piece, while this stuff is $8.20 for 5'. I didn't see what guage the metal was.

My DC is a HF 2hp job that runs on 110v. I don't recall the CFM numbers on it (probably over exaggerated anyway).

What I want to do is run 6" mains, reduce to 4" at or near the tooling then 4" flex to the tool. Of course I'd have some 90's and Y's, probably less than 20' for my main run. I'll use some blast gates to control flow. I would tape up the joints and seams to seal it all up.

Unless you guys talk me out of it, I'm thinking of giving this pipe a try.

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post #2 of 4 Old 01-08-2011, 11:21 AM
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I've never tried it.

You could buy a length, cap it, and hook to your DC, and see what happens.

OH, wait a minute ............Yep!.............That's what he said!

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post #3 of 4 Old 01-08-2011, 12:05 PM
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The snap lock duct will work just fine. Don't go any lighter than 28 gauge. The only way the duct will collapse is if you get a clog or you run the system with all of the blast gates closed. At that I seriously doubt that your particular collector would collapse it anyway. Have you tried checking with a local HVAC contractor to see if you can get some spiral from them? It should be alot cheaper through them. If you decide to use the snap lock, tape the seams, but use the aluminum ducting tape to seal them. not duct tape. You could also seal the seams with JB Weld (but that could get expensive).

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post #4 of 4 Old 01-08-2011, 03:45 PM
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I agree it should work but the spiral would be better.
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