American Standard 1 1/2In Offset Tail-Piece - AMS-M964303

An offset tailpiece is the drain fitting that drops from the sink strainer and steps sideways before it meets the trap. It's the part you reach for when the trap arm or disposal doesn't line up under the bowl, usually because of a cabinet obstruction, a back wall drain that sits off center, or a second bowl. The American Standard M964303 is a 1-1/2 inch offset tailpiece for sink applications in chrome.

It is sized for 1-1/2 inch drain work, which is the standard kitchen sink drain size in North America, so it mates with a 1-1/2 inch P-trap and a 1-1/2 inch strainer outlet. If your trap and strainer are 1-1/4 inch (more common on lavatories), this is the wrong size and you would need a 1-1/4 inch tailpiece or a reducing washer.

Use a straight tailpiece when the strainer outlet sits directly over the trap. Go with the offset version, like the American Standard 1-1/2 inch offset tailpiece, when the drain has to shift laterally, typically to clear a garbage disposal, a pull-out waste basket, or a drain stub that isn't centered under the bowl. Swapping a straight tailpiece for an offset is often the fix when a new sink bowl is deeper or positioned differently than the one it replaced.

The American Standard M964303 is sold as the tailpiece itself. Plan on having the slip nuts and beveled washers for the trap joint on hand, plus the strainer washer at the top connection, since those wear items are commonly replaced whenever a drain line is opened up.

Chrome only, ordered as M964303-0020A. That matters if the piece will be visible, such as under a wall hung or exposed-trap sink, where the rest of the trap assembly is usually chrome as well. In a closed base cabinet the finish is cosmetic.