American Standard 1660186.278 Shower Arm Round Escutcheon

Product Description

The American Standard 1660186.278 is a ceiling-mount shower arm with a round escutcheon plate, designed for use in residential and light commercial shower installations. The arm measures 6 inches in length and connects via a standard 1/2 inch NPT threaded fitting, making it compatible with conventional shower supply rough-in. Licensed plumbers typically install this component as part of a new shower head rough-in or a fixture upgrade. The round escutcheon covers the ceiling penetration for a clean, finished appearance at the mounting point.

This shower arm is intended for ceiling-mount shower configurations where the water supply drops vertically from above rather than exiting a wall. It suits residential bathrooms and hotel or multi-unit applications that use a ceiling-mounted rain-style or standard shower head. The 1/2 inch NPT thread is the standard size found in most residential water supply lines, allowing straightforward connection to existing rough-in plumbing without adapters in typical installations.

Key Features

• Ceiling-mount orientation directs supply from overhead for rain-style or standard shower head configurations
• 6-inch arm length provides clearance between the ceiling surface and the shower head connection point
• 1/2 inch NPT threaded connection matches standard residential shower supply rough-in
• Includes a round escutcheon plate to cover and finish the ceiling penetration

Compatibility

Designed as an OEM-style ceiling-mount shower arm for residential and light commercial plumbing systems using standard 1/2 inch NPT shower head connections.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and depressurize the line before making any connections. Apply thread sealant tape or approved pipe compound to the NPT threads before assembly to ensure a watertight seal. Do not overtighten the escutcheon or arm against finished ceiling surfaces to avoid cracking or surface damage.

Technical Specifications

• Arm Length: 6 inches
• Connection Size: 1/2 inch NPT
• Mount Type: Ceiling Mount
• Escutcheon Shape: Round

Standard Information

• Brand: American Standard
• Manufacturer Part Number: 1660186.278