Recovery equipment for refrigerants other than R-12 and R134a must be test by?
Recovery equipment for refrigerants other than R-12 and R-134a must be tested by a manufacturer-approved testing facility or method. There isn't a single, universally mandated testing body. The specific requirements depend on the refrigerant and the applicable regulations (which vary by country and sometimes even region). The manufacturer's instructions will specify the necessary testing and certification procedures.