Can you tell if you have enough CFM/pressure by looking at the heads while blowing out a zone?
Example: If the heads do not pop-up fully, their is not enough CFM.
Let me clarify, the sp line is 1" 13GPM but the length from the manifold to the last head on the zone is 450'. Will more CFM be required to blow out this line?
Is it ok to connect the air hose to the 1/4" ball valve on the VB? Or will this small of a pipe size recuction cause a decrease in the amount of CFM that can pass through to the sp lines?
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