How do you blow out (winterize) a newer Hunter multi-zone residential Sprinkler system? 1 zone at a time? how

Question

1. Do I hook up the compressor and open one zone at a time by using those "1/4 turn" valves inside the box outside?

2. I have more than one ground box with those valves in it in different parts of the yard. Do they operate independently from the main box near the house or does a specific valve inside the main box need to be opened for the valves in one of those smaller boxes to be activated?

3. having trouble finding the right compressor fitting - i think its 1/8" but the fitting I have looks like it has tighter threads.

4. This is a clean/dirty system which uses well water - because of this is there anything else I need to consider?

Answer 1

Call a company, you need a high volume compressor, not a high pressure compressor, they will have the proper fittings. Try to do it yourself with an ordinary compressor will not purge all the water out of the lines.