Washington Facts about Medical Gas Piping Installer Endorsement is a certification program offered in the state of Washington by the Department of Labor & Industries (L&I). This program is designed to ensure that medical gas piping installers have the knowledge and skills necessary to safely install and maintain medical gas piping systems. It is required for those who wish to install medical gas piping systems in healthcare facilities within the state. There are two types of endorsements available: Medical Gas Piping Installer Endorsement and Medical Gas Piping Installer Maintenance Endorsement. The Medical Gas Piping Installer Endorsement requires installers to complete a three-hour course and pass a written exam. The Medical Gas Piping Installer Maintenance Endorsement requires the completion of an additional four hours of coursework and a written exam. Both endorsements require applicants to have a valid Washington State Journeyman Plumber license or equivalent. The endorsements must be renewed annually, and they may be revoked or suspended if an installer fails to comply with the requirements of the program.