THISThere are lots of articles about this. It's all about CFM, not pressure. So a little shop compressor with a tank will not be a good idea.
See page #2 of Hunter's guide https://www.hunterindustries.com/sites/ ... zation.pdf
Do NOT exceed 60PSI, because there will be potential for air hammer /compression in the system much higher than that. A lot of poly line has an 80# rating. Water does not compress, air does.
I would not ignore blowing it out and hope for "gravity drain", as a freeze in the valves / manifold and/or the backflow can be really expensive. And if PVC pipe, it can shatter for many feet from a small freeze area. (btw, manually drain the backflow, never blow through it)
Pay attention to their tips on 1/4 turn ball valves, etc. It does matter.
As said, it isn't the PSI of the compressor, it is how much air it can push continuously. Some 11 gallon compressors only deliver low single digits CFM (cubic feet per minute) and others are over 5 or 6 CFM. For a very small yard and 3 zones I'd think the higher CFM 11 gallon ones are ok. I always do all the zones twice and I'm using a 30 gallon 10+ CFM compressor. The sprinklers was my "excuse" to buy the compressor
Statistics: Posted by twh — Tue Sep 17, 2024 2:00 am — Replies 14 — Views 1226