Its a good step to ensure that any remaining fluid in the system is flushed out. Similar to if you were to flush out your cooling system, sort. Youtuber ChrisFix has a lot of good videos on the subject.
You could do that (if you don't care to reuse it later on) or carefully disconnect the line from the spray nozzles and empty the fluid into a bucket/container.
Last edited by werty316 on Nov 16th, 2017 12:29 pm, edited 1 time in total.
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Do or do not. There is no try.
Do or do not. There is no try.