how important is this step in winterizing?
my buddy, who's not good with computers, forgot this step when winterizing last week in NJ. He did not blow the lines and added antifreeze at the water pump bypass inside. Everything else was done...
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Push on end of check valve plunger ONLY when pressure is off cold water system......otherwise you can dislodge the o-ring on end of plunger and then check valve will NOT seal.
