Fluid distribution system having fluid flow restriction

A fluid distribution system comprising:

• a first fluid container having a fluid outlet;
• a second fluid container having a fluid inlet defined in a body of the second fluid container, the second fluid container being positioned below the first fluid container;
• a fluid line interconnecting the outlet of the first container and the inlet of the second container;
• an inverted umbrella valve between the fluid line and the inlet, said valve arranged to allow fluid flow from the first container to the second container via the fluid line;
• and
• a restrictor for restricting said allowed fluid flow through the fluid line,
• wherein the inverted umbrella valve is arranged such that a positive fluid pressure from fluid contained in the first fluid container urges the umbrella valve into sealed engagement with the body.