Cleaning of drains; Drainage services; Heating equipment installation; Heating equipment installation and repair; Installation of heating apparatus; Maintaining and repair of roof guttering; Plumbing; Maintenance of plumbing; Insulation of pipes; Maintaining and repair of drain pipes; Pipe-fitting; Pipeline laying; Pipeline construction and maintenance; Renovation of plumbing; Maintenance and repair of gas installations and equipment; Repair of gas supply systems; Sewer pipe cleaning; Sewer pipe maintenance; Sewer pipe servicing; Unblocking of drains; Installation and repair of air-conditioning apparatus; Installation and repair of air conditioning apparatus; Installation of apparatus for air-conditioning; Installation of apparatus for sanitation; Building repairs; Installation of sanitary apparatus; Pump repair; Repair services; Installation and repair of underwater pipelines; Underwater repair