Welcome to GasMark Plumbing and Heating We have years of experience and award-winning plumbing throughout the Cardiff and South Wales region and also offer a friendly, efficient and professional standard of work. Our service includes some Boiler installations, Full heating system, Full bathrooms, Full kitchen refurbishments, Leaks and general maintenance etc. Our engineers have many years experience and fully trained and also they are Gas Safe registered heating engineers, We also have our own team of electricians, plasters, tilers and decorators.