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, solutions for connecting concrete manholes to structured wall pipes in plastic have been investigated. The project has also analysed conditions in the field, interviewed customers, contractors and inspectors and tried to understand the origin and cause of the perceived problems with leaking joints. Different types of joints between concrete manholes and plastic pipes have been identified. The new edition of “AMA Anläggning 20” requires seals to be used at the joints, but there is always some lag to implement new editions in procurements. To have consistent requirements for seals, supplementary wording from this report should be introduced in “AMA Anläggning” under PB, PC and PD. In this report, efforts have also been made to formulate requirements for materials and tightness testing, which customers can use in procurements or project instructions to improve the quality of their joints. However, further work will be required to link these to appropriate standards at the system level. The requirements for vulcanized rubber and, also thermoplastic elastomers in applicable standards need to be tightened, but this is a long-term process. A proposal from a previous project is adopted in this report, which is to perform relaxation tests for longer time periods. The report's proposal for requirements for verification of joint seals is based on product standards for concrete manholes and unpressurized plastic pipes, as well as a general standard for unpressurized piping systems. However, there is no standard or similar where these requirements can be set. Optionally, a voluntary labelling could be applied. Plastic pipes are marked in the Nordic countries with Nordic Poly Mark and for some other products, P-marking has been introduced through SP / RISE. Furthermore, the report states six success factors for water tight unpressurised piping systems, which include favourable contractor conditions, that accuracy in pipe laying is applied, that correct joint seals are used, that the supplier's instructions are followed, that on-site inspections are carried out and that leakage tests are carried out.