American Standard Town Square Shower Arm 1/2-14-in. Threads - AMS-A901428

The Town Square shower arm uses 1/2-14 threads, which is the standard 1/2 inch NPT pipe thread used on residential and commercial showerheads and shower drops. Both ends are the same size, so it threads into a 1/2 inch drop ell in the wall and accepts any showerhead with a standard 1/2 inch inlet. Wrap the threads with PTFE tape or use pipe dope when you install it.

For most units, yes. A shower arm threads into the drop ell already inside the wall and unthreads from the same place, so swapping it is done from the finished side with a wrench and fresh thread sealant. The A901428 uses 1/2-14 threads, the same size as the arm you are pulling out on a standard opening. You only need to open the wall if the drop ell itself is damaged or the old arm breaks off in the fitting.

It is sold as part of the Town Square line, but the connection is generic: 1/2-14 pipe thread on both ends. That means it works with any showerhead using a standard 1/2 inch inlet, not just American Standard trim. Matching it to Town Square matters for appearance, not for fit.

Yes. The A901428 arm is specified for shower and tub applications, so it suits a shower-only stall or a tub/shower combo where the head mounts above the tub. It is the wall-mounted arm that carries the showerhead, not a tub spout, so a diverter tub filler is still a separate part.

Brushed nickel is ordered as A901428-2950A. American Standard uses the suffix after the base number to designate finish, so quoting the full number with the suffix is what gets you the brushed nickel arm rather than another finish in the same family.

Order it as the arm itself. The A901428 is catalogued as a shower arm, and no separate escutcheon or flange is listed as included, so if your wall opening needs covering plan on a matching shower arm flange. The showerhead is also a separate purchase.