Lettoi Corporation (Lettoi) is a company that manufactures plumbing fittings and fixtures based in Chicago, Illinois. Lettoi sold or offered for sale lavatory faucets and water closets in California, from August 2020 to August 2024.

This case was the result of an investigation performed by California Energy Commission (CEC) staff. CEC’s investigation and testing process identified that Lettoi was manufacturing and offering for sale Deer Valley brand lavatory faucets and water closets that did not meet the efficiency standard, were not marked properly, and were not certified to the Modernized Appliance Efficiency Database System (MAEDbS).

To resolve this matter, Lettoi executed a Settlement Agreement with CEC on March 24, 2025, for $12,000.00. The penalty monies are deposited into the Appliance Efficiency Enforcement Subaccount as required in Public Resources Code 25402.11. Lettoi has also agreed to a compliance plan to discontinue sales of non-compliant models, add the appropriate marking, and certify all models to MAEDbS before continuing to sell in California.