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sprinkler winterization question

19 years ago

Hello, all.

I tried to blow out water yesterday using a 5HP 20 Gal pump. A couple of questions: I know I won't be able to take all the water out with this pump, but how much should I take out? Is there a rule of thumb? I remember I read somewhere that as long as sprinkler heads stay up after the mist, I am putting in enough volume of air. But I am not getting that. Some water comes out but after some mist, heads just go back.

Also, I have this one particular zone that is on quite a slope that I did not get any water out. Not even the heads will pop up. This is the closest zone to the pump. Is it normal or should I be concerned about this?

Any comments or tips will help. Thanks a lot.

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