Systems and methods for supplying and/or dispensing fluid

A system for supplying at least two fluids in proportioned quantities, the system comprising:

• a first intake passage configured to be in flow communication with a source of a first fluid;
• a second intake passage configured to be in flow communication with a source of a second fluid;
• a fluid transfer device in flow communication with the first intake passage and the second intake passage;
• and
• a pump in flow communication with the first intake passage, the pump being configured to transfer the first fluid via the first intake passage to the fluid transfer device,
• wherein the fluid transfer device comprises a first chamber and a second chamber, and the first intake passage is in flow communication with the first chamber and the second intake passage is in flow communication with the second chamber,
• wherein operation of the pump is configured to supply a quantity of the first fluid to the first chamber such that a quantity of the second fluid is expelled from the second chamber, and when operation of the pump is ceased, a quantity of the second fluid enters the second chamber and a quantity of the first fluid is expelled from the first chamber.