The case of a hydraulic jump in a closed conduit with pressure flow downstream from the jump has been investigated for horizontal conduits by a number of researchers. In the research reported herein, the influence of conduit slope is considered, including very steep slopes (up to 30%). The theoretical analysis of this case does not lead to a direct solution for jump height because there are too many unknowns in the equation. Accordingly, experimental observations were made for a wide range of Froude numbers and slopes, and non-dimensional design curves are provided.