Product Description

Includes 4" to 2-1/2" Reducer - JW1044

Product Details

• Amazon Sales Rank: #124 in Home Improvement
• Brand: Jet
• Model: JW1044

Features

• 4-inch to 2-1/2-inch reducer allows you to step down from a larger size machine
• Connects 4-inch line to 2-1/2-inch dust ports
• Step down increases air velocity where it is needed most
• Reducer lets you adapt to many machines
• 2-1/2-by-4-inch outer diameter

Amazon.com Product Description
Ideal for woodworkers with Shop-Vacs or the equivalent, the Jet 4-Inch to 2-1/2-Inch Reducer allows you to step down from a larger size machine. The reducer connects 4-inch line to 2-1/2-inch dust ports. The step down increases air velocity where it is needed most. With an outer diameter of 2-1/2-by-4-inches, this reducer lets you adapt to many machines.

From the Manufacturer
Woodworkers who own Shop-Vacs or the equivalent will appreciate this adapter. It allows you to connect a 4-inch line or to tie into other machines that have 2-1/2-inch dust ports. The outer diameter is 2-1/2 by 4 inches.

Customer Reviews

Size is important
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.

Not as pictured
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...
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.