CSLB C-36 Plumbing ContractorFixture and Appliance InstallationMedium
A plumber is installing a new wall-mounted toilet. Which of the following is the most critical consideration for ensuring a secure and code-compliant installation?
- AThe color and style of the toilet match the bathroom decor.
- BThe toilet seat is soft-close for comfort.
- CThe rough-in dimensions match the specified carrier frame.
- DThe flush mechanism is dual-flush for water efficiency.
Show answer & explanationAnswer & explanation
Correct answer: C. The rough-in dimensions match the specified carrier frame.
Wall-mounted toilets rely on a concealed carrier frame for support. The rough-in dimensions of the drain and mounting bolts must precisely match the specifications of this carrier frame for a secure, stable, and code-compliant installation. Incorrect rough-in will prevent proper mounting.
Why the other options are wrong
- A. Aesthetic considerations are not critical for structural integrity or code compliance.
- B. Soft-close seats are comfort features, not critical for core installation.
- D. Dual-flush mechanisms relate to water efficiency, not the physical mounting and stability of the toilet.
Wall-Mounted Toilet Rough-in
The specific measurements and positioning of the drain connection, water supply, and mounting bolts required for the installation of a wall-mounted toilet's carrier frame.
- Crucial for structural integrity and proper function.
- Must match the manufacturer's specifications for the carrier.
- Incorrect rough-in leads to installation failure or instability.
Memory trick: Rough-in 'Right' ensures a 'Rigid' and 'Reliable' install.