First, let's begin with the start-up. The start-up is the process in which your sprinkler system is ready to be turned back on again and set up for regular use after its winter break. The start-up should be done professionally to avoid damaging any aspects through incorrectly preparing the system. Winterization is the process by which your sprinkler system is prepared to brace the winter months preemptively stopping the pipes from freezing, cracking, blocking, etc., due to frigid temperatures.