99% of condo winterizations make no sense because contractors who are hired for this job do NOT turn the main water supply to the unit. So, in theory, if the tempature drops below freezing (which of course never happens if the heat is working), the pipes would still burst. This type of winterization is pathetic and generally waste of time and money but banks still order them and fund it with taxpayers' money they received as a part of the 2008 bailout. Anybody still remembers that?
Are you feeling lucky? The association sia acting as your agent in this situation, and while you may have recourse with them if they fail to perform as your agent, you still bear the final responsibility for their actions.
Be smart, do what you would do with any property, don't count on others to do things you may be held
Accountable for when they fail in their actions.