Abstract: A surge control fluid delivery system is described particularly adapted for pumping of high-viscosity substances from a reservoir for dispensing. The system includes a manifold which is connected to an outlet line of a pump. A vent circuit for returning fluid from the manifold to the reservoir is also provided. Surge control is achieved through a control system which modulates the fluid supply pump and further activates a valve in the vent return line to maintain the pressure of the fluid within the manifold to within adjustable upper and lower limits. The system further includes means for automatically switching from one source of fluid to another upon depletion of the first source.