This report is a result of the SUSPIPE project. Within SUSPIPE, the water and sewage industry's manufacturers, suppliers and customers collaborate. In this sub-project, the possibilities for better products and methodology for electrofusion of large-dimension polyethylene pipes have been investigated through interviews, measurements, and simulations. When building new water and sewage pipe networks of polyethylene pipes, the network owners should demand that the work complies with “AMA Anläggning 20,” that the welders have training with an EWF certificate and that procedure testing is carried out before the construction starts. Furthermore, they should have inspectors present at the construction sites. The members of INSTA-CERT should review the certification regulations regarding requirements for ovality and indirect methods for measurements of residual internal stresses in polyethylene pipes for water and sewage. To achieve good quality joints in polyethylene pipes, rotating scraping tools, fixing tools and rounding clamps must be used. Furthermore, the trenches must be wide and long enough for fitting equipment and personnel and for adjusting the positions of the pipe ends.