The document summarizes research that optimized a water distribution network using Particle Swarm Optimization (PSO) with different inertia weight functions. Eight inertia weight functions were tested to study their effect on network cost. The minimum cost solution of Rs. 419,000 was obtained using a logarithmic inertia weight function with a swarm size of 50 over 15 runs. Results closely matched those from a previous study that optimized the same benchmark network, validating the developed PSO program.