System for handling displacement of liquid products

A dispensing system for dispensing an off-gassing liquid product mixed with a diluting product, comprising:

• a dispenser including a dispenser outlet;
• a product container containing the liquid product;
• a product line connecting the product container and dispenser, the product line including at least one check valve to maintain prime in the line;
• and
• a passive displacement system operatively attached to the product line and configured to redirect liquid product in the product line from displacing through the dispenser outlet, said displacement system comprising a displacement check valve operatively connected to the product line;
• wherein the displacement check valve has a lower crack pressure than the at least one check valve of the product line to allow the liquid product to drain from the product line to at least the product container to prevent displacement of the liquid product;
• and
• said passive displacement system utilizing the expansion of the off-gassing liquid product only to break the crack pressure of the displacement check valve;
• wherein the displacement check valve and the at least one check valve maintaining prime in the line are contained in a single fitting.