A carbon dioxide manifold contains an internal passage providing communication between a pump supply, a liquid container, a gas container, and a beverage dispenser. A valve is located inside the internal passage. The valve has an open position in which communication exists between the liquid container, the gas container, and the beverage dispenser, but not with the pump supply. The valve has a closed position in which communication exists between the pump supply and the liquid container, and between the gas container and beverage dispenser, but the only communication between the pump supply/liquid container and the gas container/beverage dispenser is through an orifice that allows a restricted flow of carbon dioxide through the valve.