Gas injection apparatuses include a gas inlet, a gas outlet, a primary gas chamber, a gas reduction chamber, and a fluid dispensing passageway. The primary gas chamber has a first cross sectional size and is fluidly connected to the gas inlet and the gas outlet. The gas reduction chamber is fluidly connected to the primary gas chamber, the gas inlet, and the gas outlet. The gas reduction chamber has a second cross sectional size that is less than the first cross sectional size. The fluid dispensing passageway is fluidly connected to the gas reduction chamber by a gas delivery orifice having a third cross sectional size that is less than the second cross sectional size.