Monday 9 November 2020

time to grease backwash slide valve O rings but do I drain anything first

Hi
Tis cold and backwash slide valve stiff. Should have lubed in August but did not. And with rains will need to back wash from time to time.
Is Pentair WC-212-136D
Before removing valve, do I need to release air / drain water or anything?
And is there a grease that tolerates cold weather?
Thank you.


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