A mix manifold comprising: a valve housing having a first fluid inlet, a second fluid inlet, a third fluid inlet, and a fluid outlet; a first fluid flowpath extending between the first fluid inlet and the fluid outlet; a second fluid flowpath extending between the second fluid inlet and the fluid outlet; a third flowpath extending from the third fluid inlet, wherein the third flowpath includes a first branch extending to the first fluid flowpath and a second branch extending to the second fluid flowpath; a first check valve disposed in the first fluid flowpath at a location downstream of an intersection between the first branch and the first fluid flowpath; a second check valve disposed in the second fluid flowpath at a location downstream of an intersection between the second branch and the second fluid flowpath; a first valve having a first valve member disposed in the first fluid flowpath and configured to control fluid flow between the first fluid inlet and the fluid outlet; a second valve having a second valve member disposed in the second fluid flowpath and configured to control fluid flow between the second fluid inlet and the fluid outlet; a third valve disposed in the third flowpath and configured to control fluid flow from the third fluid inlet to the first branch and the second branch, and a first handle extending between and linking the first valve and the second valve such that the first handle can simultaneously actuate the first valve member and the second valve member; and a second handle connected to the third valve and configured to rotate a third valve member of the third valve, characterized in that the first valve member is configured to rotate between an open state and a closed state; the second valve member is configured to rotate between an open state and a closed state; and in that the second handle is configured to rotate the third valve member of the third valve between a first position, a second position, and a third position; wherein the third valve directs fluid to the first branch when in the first position, the third valve directs fluid to the second branch when in the second position, and the third valve prevents fluid from flowing to either the first branch or the second branch when in the third position. a valve housing having a first fluid inlet, a second fluid inlet, a third fluid inlet, and a fluid outlet; a first fluid flowpath extending between the first fluid inlet and the fluid outlet; a second fluid flowpath extending between the second fluid inlet and the fluid outlet; a third flowpath extending from the third fluid inlet, wherein the third flowpath includes a first branch extending to the first fluid flowpath and a second branch extending to the second fluid flowpath; a first check valve disposed in the first fluid flowpath at a location downstream of an intersection between the first branch and the first fluid flowpath; a second check valve disposed in the second fluid flowpath at a location downstream of an intersection between the second branch and the second fluid flowpath; a first valve having a first valve member disposed in the first fluid flowpath and configured to control fluid flow between the first fluid inlet and the fluid outlet; a second valve having a second valve member disposed in the second fluid flowpath and configured to control fluid flow between the second fluid inlet and the fluid outlet; a third valve disposed in the third flowpath and configured to control fluid flow from the third fluid inlet to the first branch and the second branch, and a first handle extending between and linking the first valve and the second valve such that the first handle can simultaneously actuate the first valve member and the second valve member; and a second handle connected to the third valve and configured to rotate a third valve member of the third valve, characterized in that the first valve member is configured to rotate between an open state and a closed state; the second valve member is configured to rotate between an open state and a closed state; and in that the second handle is configured to rotate the third valve member of the third valve between a first position, a second position, and a third position; wherein the third valve directs fluid to the first branch when in the first position, the third valve directs fluid to the second branch when in the second position, and the third valve prevents fluid from flowing to either the first branch or the second branch when in the third position.