Pipeline is a long-term engineering project. In addition to comparing the initial purchase cost, you should carefully evaluate long-term maintenance costs and overall life cycle costs. Since the PE pipe does not corrode and leak at the joint, the situation of continuous repair of the aged metal pipe or leakage with all other pipes at the joint will not be happened on PE pipes. Besides, initial cost savings are also achieved through the opportunity to install without trenching. Compared to other pipelines, HDPE has lower installation costs, lower maintenance rates, less water loss and lower energy costs. Therefore, HDPE has the lowest life cycle cost, and service life is 75-100 years estimated by Institute.