Environmental factors like soil composition, water quality, and exposure to natural elements can significantly impact piping material selection for irrigation and HVAC systems. For example, piping materials used in irrigation systems may need to resist corrosion from soil and water, while materials used in HVAC systems may need to resist degradation from UV exposure or extreme temperatures. Understanding the specific environmental conditions of the application is critical to selecting a piping material that can withstand these factors and provide long-term performance and reliability.