What does a larger plumbing chase typically indicate when discussing wall-hung water closets?

The indication that a larger plumbing chase is often associated with the requirement for a carrier is rooted in the need for structural support for wall-hung water closets. Wall-hung fixtures, such as toilets, require significant support because they are mounted on the wall and do not have a conventional floor connection.

The carrier is a structural component that supports the weight of the toilet and provides for adequate space to run plumbing lines, such as water supply and waste pipes. A larger plumbing chase allows for more room to accommodate the carrier, ensuring that the connection points for plumbing are correctly aligned and that the fixture is securely mounted.

In contrast, while larger chases may indeed increase costs due to more material and construction work, this is not their primary function; they are designed to facilitate proper installation and support for wall-hung systems. Although more space may be needed for installation, the focus of the chase's design is primarily to accommodate the carrier. Aesthetics, while important in architectural design, do not directly relate to the functional requirements of the plumbing chase in this context.