George Mesman is a specialist in the field of water catchment, drinking water distribution, distribution techniques and distribution pipe materials. For the design and management of the distribution network, he uses the possibilities provided by the pipe network software programs Infoworks and EPANET. George has extensive experience in building and applying pipe network models, and in the analysis required to solve research problems. He ensures the transfer of knowledge on self-cleaning networks and distribution-network cleaning programmes to national and international water pipeline companies. Besides practical applications in these specialist fields, he is involved in the Netherlands in the implementation of the cleaning of the distribution networks and, within the Watershare framework, in the implementation of rules for self-cleaning networks in Oman. George employs his special expertise in drawing up Drinking Water Operational Codes (PCD in its Dutch initials). He has also developed knowledge-based rules for the application of PVC and PE pipe materials in collaboration with the water sector. Damage analysis, and the cause and effect, of ruptures in drinking water pipes is also an area to which George directs his interest. Ruptures in pipes made of PVC, PE, asbestos-cement, GVK, cement and steel, are related to the pipes’ age, installation environment, operational management, and material properties. Developing knowledge through research into the combination of factors underlying the pipe ruptures helps in accurately evaluating the different materials.