One of the most important types of pipes offered in pipe stores is PVC pipe fittings. Polyethylene hoses available on the market are divided into three general groups: ordinary polyethylene hose (low pressure), semi-durable hose, and high-pressure pipe. The types of polyethylene pipes and fittings have various uses as mentioned below: Ventilation systems (low-pressure pipes are mainly used for this purpose). Sewer systems (usually semi-durable polyethylene pipes). Covering all types of electrical cables (durable or semi-durable polyethylene pipes). Industrial and industrial wastewater (high-pressure polyethylene pipe). Major urban uses. Large water supply networks.