Which concept focuses on preparing the system for the off-season by removing water and protecting components from freezing?

• A. Unions
• B. Winterization/start-up
• C. Drain valves
• D. Grounding

Answer: (B)

Winterization is the process of prepping the irrigation system for cold weather by removing water and shielding components from freezing. The aim is to prevent residual water in pipes, valves, and sprinklers from freezing and causing cracks or bursts. In practice, this means shutting off the water supply, draining the lines, and often blowing out remaining water with compressed air to ensure the system is dry. It may also involve insulating exposed parts or taking other protective steps for components that can be damaged by freezing. This differs from spring start-up, which is about bringing the system back online—opening the supply, re-pressurizing lines, and testing zones. Unions are fittings for connecting or disassembling pipe, not specifically about winter protection. Drain valves help empty sections of the system but don’t guarantee complete water removal or freezing protection. Grounding concerns electrical safety and is not related to winterizing the irrigation system.