O'Brien Plumbing Mackay is a local plumber that has been helping residential, commercial and industrial clients manage their plumbing systems for more than 47 years. Choose O'Brien Plumbing Mackay for all your general and roof plumbing needs. We can assist you with general plumbing repairs and maintenance. From leaking toilets, replacement of hot water systems, storm water drainage solutions to complete roof replacements, you can trust in our experienced team to handle your project, big or small.