This document discusses different types of water distribution systems. It describes four common layouts for distribution networks: dead end, grid iron, ring, and radial systems. It also categorizes distribution systems based on how water is distributed - by pumping, gravity, or a combination. Pumping systems require continuous operation and supervision but can distribute water without reservoirs. Gravity systems rely on elevation but require sufficient head. Combination systems use pumping to fill reservoirs and then distribute via gravity, reducing costs and satisfying fire demands efficiently. The document provides advantages and disadvantages of each layout and distribution type.