Infinity Tools وصلة Y مقاس 4 بوصة × 2-1/2 بوصة

My table saw and router had separate dust lines that kept clogging, but this Y-fitting merged them into one 4" run without any fuss. The 2-1/2" inlet grabs the smaller hose snugly, and the whole thing feels sturdy enough to survive years in the shop.

Finally, a way to use my shop vac on the same line as the big dust collector. The Y-fitting's step-down design is seamless, and the plastic feels thick enough to not crack under the hose tension.

The 4" side grips my main dust pipe tightly without needing a clamp, and the 2-1/2" port smoothly transitions my sander hose into the system. I’ve been using this to split off the shop vac while keeping the big line open—saved me from swapping hoses constantly.