Using over the winter - do I need to winterize

the only way I know to not winterize properly is to blow out the system. then you stand the chance of water settling back into low spots. can do the winterizing the right way with antifreeze and drain and blow that out collecting the antifreeze for reuse. if you reclaim antifreeze I would blow out the system first so there is only a little dilution.
and no, the proper chemicals are safe
bumpy