I cannot find a service in northern NJ to winterize my sprinkler system for less than $100, so I want to try doing it myself, I just don't want to break anything. I've watched a few youtube videos, but haven't quite found a system that looks like mine so I really want to be sure I'm doing this right. I know where/how to shut off the water to the system in my basement. I was planning to rent an air compressor from home depot. I'm just not sure where to hook it up, and which knobs to turn and when. Below is a picture of my system. I added numbers to make it easier to reference the different parts.
Plumbing – Winterize Sprinkler System
irrigationplumbingsprinkler-systemwinterizing
Best Answer
You want to clear water from the system and the backflow valve. It looks like the hose bib is a tee off the irrigation feed with its own valve.
If there is no inside shut-off valve dedicated to what comes out of the wall, follow these instructions:
You're done.
If there is a dedicated inside shut-off valve, follow these instructions, instead:
BTW, you want a compressor with a lot of CFM or a large tank, but it doesn't need to be high pressure. The compressed air will drain pretty fast when you're blowing it out of open ports and lots of sprinkler heads.