plumbing; plumbing services; maintenance of plumbing; repair of plumbing; advisory services relating to the installation of plumbing; plumbing maintenance advisory services; advisory services relating to the maintenance of plumbing; plumbing installation advisory services; plumbing repair advisory services; advisory services relating to the repair of plumbing; maintenance of water purifying apparatus; plumbing and glazing services; installation of plumbing; installation of plumbing systems; installation of equipment and apparatus for gas and water supply; installation and repair of bathroom heating devices; installation, maintenance and repair of water supply apparatus; emergency servicing of water supply apparatus; maintenance of apparatus for purifying water; repair of water supply apparatus; repair of apparatus for purifying water; repair of water purifying apparatus; repair of water supply installations; repair of gas and water installations; installation of apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes; installation and repair of heaters for baths; installation and repair of toilets [water-closets]; installation of apparatus for sanitation; maintenance and repair services of public utilities in buildings; installation of water pipes; installation of pipes; installation of apparatus for heating; services for the washing of buildings; installation of utilities in construction sites; installation and repair of heating; installation, maintenance and repair of heating systems; plumbing installation, maintenance and repair; toilet [water-closet] installation and repair; shower installation and repair; routine servicing of air-conditioning apparatus; routine servicing of drying apparatus; repair or maintenance of water purifying apparatus; repair or maintenance of water purifying apparatus and provision of information relating thereto; installation, maintenance and repair of household apparatus and appliances