Systems for feeding liquid into an analytical system. The liquid feed systems comprise a reservoir adapted to hold liquid for introduction into an analytical system, a liquid feed line adapted to deliver liquid from the reservoir to the analytical system, and an air feed system adapted to deliver pressurized air into the reservoir to cause liquid to flow from the reservoir into the liquid feed line. The air feed system has a dryer for removing humidity from air delivered to the reservoir. The dryer comprises a condenser assembly. The condenser assembly has a condenser block made of metal and having an extended, serpentine passageway therein. The passageway has an inlet and outlet allowing air to be passed therethrough and a drain allowing condensed moisture to flow therefrom. The condenser assembly also has a cooling element mounted to the surface of the condenser block for absorbing heat from the condenser block.