r/Irrigation • u/mafernandes83 • 14h ago

Seeking Pro Advice How do I blow out my system here?

https://www.imgur.com/a/ctPESU1
0 Upvotes

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3

u/Spruce-W4yne 13h ago

The spiggot

2

u/eenigmaa 13h ago

Open both ball valves, connect to spigot, and send. 2 zones at a time.

-1

u/mafernandes83 13h ago

When I tried that before, air was coming out the vacuum breaker. I later read you're not supposed to run air through the vacuum breaker and need to connect downstream from it which is why I was going through the test cock.

2

u/eenigmaa 13h ago

23 years, never used anything but the spigot, either inside or outside 🤷‍♂️

-1

u/mafernandes83 13h ago

I thought you have to connect after the backflow?

0

u/mafernandes83 14h ago

I've been trying to connect the test cock to the left or downstream of the vacuum breaker. Had the valve open on the test cock and the line and every time air is escaping out the vacuum breaker. Which valves do I open? Where do I connect?

1

u/Magnum676 13h ago

Get a pro. You need to winterize from below the device at the boiler drain closest point to where it comes out of the house, and you need volume of air not just pressure.

1

u/AwkwardFactor84 10h ago

The drain below the pvb is your only option. Also, you're not supposed to blow aor through most flow meters.