True or False: Journeyman plumbers are exempt from having a Class 5 license to install or replace by non-welded means, a potable domestic water heater, not used for space heating up to 200 gallons, 210 degrees, 150 psi and 750,000 Btu.

The statement is false because a Class 5 Pressure Piping Mechanic License is specifically required for installing or replacing certain types of pressure piping systems, including those associated with potable water heaters, regardless of the means used, such as non-welded methods. Journeyman plumbers, while they may have competencies in plumbing and certain installations, do not receive automatic exemption from the licensing requirements when it comes to systems that involve pressurized conditions.

The regulations and licensing requirements are in place to ensure that all individuals performing such work have the requisite training and understanding of safety standards and code compliance associated with high-pressure and high-temperature systems. Therefore, even if a journeyman plumber has extensive experience, they must still obtain the Class 5 license to legally perform the installation or replacement tasks specified in the question. The distinction is critical to maintain safety standards in plumbing practices.