Fluid distribution device

A fluid distribution device including:

• a distribution block having an array of fluid flow passages, the flow passages being arranged in a plurality of at least first and second groups with each flow passage being included in a respective first group and a respective second group of flow passages;
• and,
• valve means operable for controlling fluid flow through the passages, the valve means including an at least first series of valve members of which each valve member is associated with a respective one of the first group of flow passages and an at least second series of valve members of which each valve member is associated with a respective one of the second group of flow passages, each valve member being movable between a closed position preventing flow through the associated flow passages and an open position permitting flow along those passages, whereby when all of the valve members associated with any one flow passage are in the open position fluid is able to flow through that passage.