Abstract: An angled check valve has a valve housing with an inlet for admitting fluid flow into the housing in a first direction and an outlet for discharging fluid flow from the housing in a second direction. The first direction and the second direction are generally perpendicular. An inlet check assembly in the housing has a valve member movable in the first direction for preventing fluid flow from exiting the housing through the inlet. An outlet check assembly in the housing has a valve member movable in the second direction for preventing fluid flow from entering the housing through the outlet. In order to facilitate assembly and service of the check valve, the housing has an opening extending in the second direction through which the inlet check assembly and the outlet check assembly can be assembled into and removed from the housing.