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The last 2 posts

Monday, July 21st 2008, 4:42pm

by Wet_Boots

The !-20 heads will not drain.

Monday, July 21st 2008, 11:32am

by JohnK (Guest)

Hunter I-20 with Check Valve & Automatic Drains

I do not blow out my lines to winterize them. I have automatic drains. I am looking to replace my rotor heads with Stainless Steel I-20's. Will the check valve in the sprinkler heads prevent my system from properly draining when I shut off the water, and open the drain in the basement for the winter?