Context: Through a dual model. based on 2 years of education in upper secondary school followed by two and a half year of apprenticeship training. Norwegian plumbing education has become an integrated part of the Technical Vocational Education and Training (TVET). Competence and skills are described in national plumbing curriculum. https://www.kingarte.com/product-category/food-servicecommercial-kitchen-equipmentcooking-equipmentcommercial-cooking-equipment-parts/