OATEY A9121A Dearborn® 1-1/2" x 16" Center to Center, Hi-Line/ Slip Joint Combination w/ Baffle Tee

Yes. The A9121A is a 1-1/2 inch combination baffle tee with slip joint connections, so it mates to standard 1-1/2 inch tubular drain piping using slip nuts and washers. It also accepts a Hi-Line connection, so the same fitting covers either method without ordering a second part.

The 16 inches is the distance between the centers of the two inlet openings on the tee, which is what has to line up with the two bowl drains on a double compartment sink. If your sink bowls are spaced differently on center, this tee will not land square under both drains and you need a different center to center size.

Yes, the A9121A is built to ASTM F409, the standard covering thermoplastic accessible and replaceable plastic tube and tubular fittings, and it is IAPMO listed. That pairing is what most inspectors and institutional specs are looking for on plastic tubular drain work.

A baffle tee carries the waste from two sink bowls into one trap. The internal baffle keeps flow from one bowl from pushing back up into the other, which is what stops the cross-flow and gurgling you get with a plain tee. The Dearborn A9121A does this job in 1-1/2 inch tubular drain, and you still need a P-trap downstream of it.

It is molded polypropylene, not brass or tubular steel. Polypropylene resists the caustic and acid drain cleaners that eat thin-wall metal tubular, and it will not corrode from standing waste water. If your spec or your property standard calls for exposed chrome brass under an open vanity, this one is a black plastic fitting and will not match visually.

A slip joint uses a nut and a beveled washer compressed onto the tube end and is the common field connection on tubular drain. Hi-Line is Dearborn's direct-connect method to the sink strainer tailpiece. The A9121A is built to take either one, so you can adapt to whatever is already hanging under the sink instead of stocking two different tees.

The tee itself is the center piece. You will still need tailpieces from each strainer, slip nuts and washers at each joint if you are going slip joint, and a P-trap with a waste arm to the wall stub. All of it should be 1-1/2 inch to match the tee.

The manufacturer part number is A9121A, sold under the Oatey Dearborn line. Order by that number to get the 1-1/2 inch size at 16 inch center to center with the Hi-Line/slip joint combination end.

It weighs 0.62 pounds, which is typical of a molded polypropylene tubular fitting rather than a brass one. That light weight matters if you are stocking a truck or carting a bulk order of these for a multi-unit sink replacement.