Customer Reviews: Read 34 more reviews...
 Size is important February 17, 2005
Brian Andrews (Knoxville, TN United States)
25 out of 26 found this review helpful
The 4" side fits my 4" quick release well enough. The 2 1/2" side fits the END of a 2 1/2" hose. This does not work well if you intend to go directly from your 2 1/2" port on your machine to your 4" dust collection hose. The adapter and the port will more than likely be the exact same size (two female sides).
The adapter is also not shaped the same as in the picture. It is not funnel shaped but a 2 1/2" tube and a 4" tube connected by a flat piece.
Is this really what you need? March 13, 2004
17 out of 19 found this review helpful
I bought this to connect my 4" Jet hose to the 2 1/2 port on my bandsaw and table saw. All the current research is to keep the dust collector draw (I have the Jet 1100) at 4" (6" on a planer) until right before the machine (actually to rebuild any machine to accept a 4"). The ad does say it's 2 1/2 OD and silly me, I didn't bother measuring the 2 1/2 at the tool end. Guess what? They're both 2 1/2 OD so they do NOT fit together. In my opinion, this is a worthless adapter - as it doesn't advertise as a hose to hose connector, and hooking a 2 1/2 shop vac to a 4" opening at the tool is like trying to suck dust out of a garbage can with a straw - the physics are wrong - this should be only used for reducing a 4" hose to 2 1/2" at the tool, but again it's the wrong diameter. A proper adapter should be either 2 1/4 OD or 2 1/2 ID to fit over the tool's port. Does anyone know where to find such an animal? I finally found a rubber plumbing connector (at Home Depot) that joined the two 2 1/2 OD fittings together. This works but we should've have to do this for a peice of plastic they charge over $5 for. Please do not hook a shop vac to a jointer and expect to remove the 1 to 5 micron diameter dust particles that can cause COPD (lung disease), you'll only get the chips, sort of.
 Not as pictured March 19, 2004
Railroad Man (Phoenix AZ)
17 out of 17 found this review helpful
The adapter I received has a flat interface, not the funnel style shown. That makes a difference if using the piece with the airflow going from 4" to 2 1/2" due to increased turbulence. If you're planning to use this downstream from large to small diameter then I suggest you find one that is indeed funnel-shaped.
 Read the features carefully - or be disappointed... February 13, 2006
David M. Boxmeyer (Boston, MA)
17 out of 19 found this review helpful
This connector is female on both ends. I didn't pay close enough attention to the description while shopping and ordered it expecting to be able to connect my 2 1/2" shop-vac hose to the 4" dust collection port on my table saw. Needless to say, I was dismayed to discover the diameter of this adapter and the port on my table saw were the exact same OD - meaning it doesn't fit without a 4" hose between the two.
If you do end up in the same situation as me - don't give up hope. I aligned the adapter and DC collection and wrapped a length of duct tape around both. A solid connection that converts my tablesaw from 4" to 2 1/2" and works great! Hope that helps those who were in the same situation as I. For those who have yet to purchase, just make sure this is really the product you are looking for.
In case anyone is really concerned, the actual construction of this adapter is solid and accurate.
 It Won't Do That June 6, 2003
Sardoc (Yucca Valley, CA, USA)
9 out of 10 found this review helpful
I bought the adapter because I want to use my shop vac with my new Delta table saw which has a 4" dust collection port. It won't do that--it is the same diameter on the big end as the dust port on my Delta (or any other piece of equipment). I had expected that it would fit INTO the dust collection port and then I could hook up my shop vac. It won't do that, so I am still looking for one that will. If you are connecting hose to hose it should be fine, but I gave it the 1 star so you would notice the issue I raised.
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