A fluid handling unit is disclosed and includes a body, a plurality of fluid passage ports formed in the body, and a plurality of orifices formed on surfaces of the body to provide fluid access to the ports from outside the unit. At least two of the orifices may have different cross-sectional areas. A modular fluid handling system is also disclosed and includes a plurality of fluid handling units, wherein adjacent fluid handling units are coupled together to form the fluid handling system. The fluid handling system may deliver fluid from at least one fluid source to fluid utilizing equipment. A plurality of fluid passages may be formed by the fluid handling units, and the diameter of one fluid passage may be greater than the diameter of another fluid passage. At least one control component may be coupled with at least one fluid handling unit.