Fluid delivery device with passive pressure equilibration

A fluid delivery device, comprising:

• a plate comprising a plate opening;
• a top wall, wherein the top wall and the plate cooperatively enclose a top chamber;
• a bottom wall, wherein the bottom wall and the plate cooperatively enclose a bottom chamber;
• a drain port communicating with the bottom chamber;
• and
• a pressure equilibration channel comprising a top channel opening communicating with the top chamber and a bottom channel opening communicating with the bottom chamber, wherein:
• the plate is configured to hold a compartment in the plate opening, such that a compartment inlet of the compartment communicates with the top chamber and a compartment outlet of the compartment communicates with the bottom chamber;
• and
• the fluid delivery device defines:
• a liquid flow path running through the solid phase material and out from the compartment outlet, through the bottom chamber, and into the drain port;
• and
• a gas flow path running between the top chamber and the bottom chamber via the pressure equilibration channel.