Using 2” pvc pipe for dust collection

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Forum topic by jody495 posted 07-11-2018 05:27 AM 1177 views 0 times favorited 5 replies Add to Favorites Watch
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41 posts in 3423 days

07-11-2018 05:27 AM

While revamping my dust collection system I needed to put a 2-1/2” blast gate in a 2” pvc fitting. What I came up with was to cut4 slots in the bell of the fitting then start to push the blast gate into the bell. I then heated the pvc fitting up with a heat gun. When the plastic was soft I finished pushing the blast gate in. I then ran a self tapping screw thru the pvc into the stub on the blast gate. I finished off by wrapping electric tape to seal the slots in the pvc. Sorry I don’t know how to post pictures

5 replies so far

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173 posts in 2448 days

#1 posted 07-11-2018 11:59 AM

Why not just get adapters?

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232 posts in 800 days

#2 posted 07-11-2018 12:38 PM

I just wrap “Duck Tape” around the female end until it is fat enough to fit tight with a slip joint. “The only tools you need are duct tape and WD40.” If it moves and it shouldn’t…duct tape. If it should move and it doesn’t…WD40!

-- I remember when Grateful wasn't Dead

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41 posts in 3423 days

#3 posted 07-11-2018 01:21 PM

A 2-1/2” blast gate wouldn’t fit into a 2” sch. 40 pipe fitting. A 4” blast gate will fit into the end of a 4” pvc pipe. It is a little loose, I put a bead of caulking around the gate before I install it then add self tapping screws to make it secure.

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6069 posts in 3212 days

#4 posted 07-11-2018 04:02 PM

Lots of methods to accomplish the same results. If it works and doesn’t leak all is good. For anyone reading and wanting a NASA style fix you could spend some time and try this.

Mark with tape 1” down from the end of the pipe, sand turning the pipe against a sander until you get a loose fit. Then take pipe to TS and use your miter sled. Slightly raise blade and rotate pipe around creating a channel, move 1/4 inch and repeat. You now have two slots for O rings that can be found in stock at hardware store, Borgs, or HF sells a cheap kit. Lubricate with WD -40 to install and you have a slip joint that has no tape and can be taken apart fairly easily. Even looks seamless if you are careful with the sanding part.

Did I do mine like this? NO. But my son wanted to better understand how such a joint worked so as an experiment we did this. The few places I have ever had trouble in the shop I just use duct tape or an adapter.


-- Live to tell the stories, they sound better that way.

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41 posts in 3423 days

#5 posted 07-11-2018 04:28 PM

Sounds good. I run a solid copper wire inside for grounding and one on the outside to prevent static electricity from causing a fire

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