A fixture carrier for supporting a plumbing fixture includes an upright and an arm. The arm is coupled to the upright and is configured to support the plumbing fixture. The arm includes a base, and an extension configured to move relative to the base. The arm is configurable in a first position where at least a portion of the base is retracted into the extension, a second position where the extension is extended away from the base, and a plurality of positions between the first position and the second position.