Pipeline injection systems for hog manure make efficient use of the nutrients present in the manure and minimize odour problems. However, they are costly to install. The level of investment varies with the size and complexity of the system. The reductions of transportation costs, road damages and risks for soil compaction associated with slurry wagon have to be considered in the economic evaluation of pipeline systems. Different pipeline systems are discussed as well as injection / application tools and incorporation equipements. An exemple is also given to help sizing systems. Tips are also given to evaluate whether it is better to buy or hire to do manure application with pipeline manure injection systems.