The main aim of this study is to perform Pressure Deficient Analysis (PDA) modeling approaches on two examples, a single source network and a case study of a Water Distribution System, Maharashtra State, India. The results of PDA modeling approaches are considered for redundancy determination, i.e. iteration-wise addition of pipes in the branch and looped network. Variance of pipe flows (VPF) is considered as a flow-uniformity parameter and is used for network design and reliability evaluation. The future scope of the study is further to compare the redundant based designs considering all PDA approaches and to discuss the advantages and disadvantages of all PDA modeling approaches in redundancy improvement. The findings of this study are to contribute to the improvement in redundancy considering different PDA modeling approaches in WDSs on implementing a real case study over the Demand Dependent Analysis (DDA) approach and offer guidance to the practitioners in performing a single appropriate PDA approach on real case studies.