I am looking to winterize my irrigation system: I called a professional company last year, and they charged me 100$ for essentially 15 min of work. One of the guys said that this was super easy to do if I wanted to do it myself next year, which indeed sounds interesting.
I have a compressor and an adapter that allows me to blow air through the system (I just bought one).
I watched videos on the topic and I believe I understand the process pretty well:
- Enable/open one circuit at a time through the control panel.
- Blow the air with the compressor until no water comes out of the circuit. Not for too long to avoid damaging/melting the sprinklers.
- "Rince and repeat" for the other circuits.
- Make sure the water input stays closed throughout winter :)
Now, most of the videos on the Internet show an underground box with knobs and pipes that one can shut off/on.
In my case, while I do have that box - picture 1 below - it only contains the electro-valves and there is no additional knob or input in there, to shut anything off or for me to plug anything into.
The only pipe that comes to that box is directly connected to a hose bib in the wall - see picture 2 - in a permanent way: it cannot be unscrewed. The hose bib has a secondary output with a knob though: we usually use it to water manually some plants not covered by the sprinkler system. The host bib has a main knob on the top that cuts water supply to both ends.
Now my question is probably stupid, but you never know:
Am I right to assume that I can just:
- Shut off the main knob (on top), effectively preventing any water from going in the system.
- Open the secondary knob and plug my air compressor on it to start the water-draining process through there.
I am mainly worried about somehow destroying the hose bib with too much pressure or something. It may be silly.
Additionally : I haven't used a compressor before, is there any pressure setting/value that I should be aware off not to burst the pipes? Anything else I should be aware of?
P.S: My compressor is this model in case it matters. I've read in many places that it was more than enough for the task, provided I am a bit patient in between-circuits.