OATEY PP9818 Dearborn® 1-1/2" x 8" Branch Tailpiece, Hi-Line w/ 1/2" Branch

Branch to center is 2 inches, measured from the flanged top down to the centerline of the side branch. That puts the inlet high in the tailpiece, well above the trap, which is what you want for a dishwasher or appliance discharge so it drains freely and stays above the trap weir. If your cabinet is tight and you need the branch lower, the 2 inch dimension is fixed on this part.

No. The slip joint nut and washer for the connection come with the tailpiece. What you will still need is whatever adapter or hose clamp your appliance line uses at the 1/2 inch threaded branch, since that side is threaded rather than slip.

Yes. This is a white polypropylene tailpiece and it is made to join soft plastic pipe at the slip joint. Polypropylene resists the caustic and acidic cleaners that get poured down kitchen and lab sinks better than thin-wall chrome-plated brass does, though it is not the look you want on an exposed pedestal or wall-hung lavatory.

Size the branch to the discharge line you are tying in. The PP9818 carries a 1/2 inch threaded branch, which suits smaller appliance and condensate-type discharges; Dearborn also builds the same tailpiece with a 3/4 inch branch for larger hose connections such as a standard dishwasher drain hose. There is also a version with the True Blue premium washer if you want the better seal at the slip joint.

The PP9818 itself is white polypropylene. Dearborn builds the branch tailpiece in both white and black polypropylene, so if you are matching black waste under an exposed installation, order the black version rather than this part number.