Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700)

Fits into my 1 1/2" laundry stack, allowing existing washer to drain and my newly added water softener to share that same pipe. Works and fits nicely.

I like how it will fit two different size piping. Works well for the water softener.

I used this air gap to drain my water softener into the washing machine stand pipe. Fit my application perfectly and now I don't need to worry about my washing machine water backsiphoning into my softener.

Exactly as described. Fit perfectly.

Returned. Not worth $25. Same function can be achieved with $5 in parts at any hardware store.

The old one gave up after 20 years and this replacement was an exact fit.

I researched this part almost obsessively when I was planning out my water softener installation. It does not perform as the video shows it online, I promise you that.The issue is, as another reviewer noted, that water does slop out of the "little windows" when the softener puts out it's max flow during a recharge, which is far less than what this part claims to be rated at. For twenty something dollars on a part made of plastic, I expect it to be leak free. Not something you want in a finished space. I think the Mr. Drain forces the water to converge too sharply just below the windows and when the water gets bottlenecked, guess where it goes. Bummer. If anyone has a suggestion of a part that doesn't leak, please let me know.

Works just ok, water slops out of the air gap and gets all over the wall, and anything around it, this device does not help to maintain a controlled water flow, it looks good on line, but Its so sloppy and uncontrolled I could not use it. I am better off drilling a hole in a 2 x4 mounting it on the wall and putting the hose threw the 2x4 at an 1" 1/2" inches above the drain.