Duane Wilson has been named as the winner of the SkillPLUMB competition, part of Skills Competition Wales.
Mr Wilson is a student at Coleg Si Gar/ConstructionSkills and works for the Plumbers Electricians Carpenter company.
Lee Hanmer, employed by S L Plumbing and Heating and a student at Yale College in Wrexham, was awarded second place.
In third place was 20-year-old Gareth Kipling from HSCT Ltd, who studies at Bridgend College.
The competition took place at Gower College, Swansea, on 25 April, sponsored by the UK Copper Board and is one of the regional competitions.
The highest-scoring competitors from all the UK heats go on to compete in the UK-wide finals of SkillPLUMB which will take place at The Skills Show in November at the NEC, Birmingham.