We have only one question tagged sprinkler-system here, and it's on preventing garden critters from chewing up sprinkler valves. Since (garden) pest control is right up our alley, it was decided that such questions are on-topic.
However, most of the questions tagged
sprinkler-system on DIY are related to plumbing issues and are off-topic here. This question on DIY was simultaneously cross-posted here (now deleted by owner) and while it got an answer within 2 hours on DIY, it didn't attract any on G&L and was closed a day later. In this discussion, although a "consensus" wasn't reached, the general opinion was that this is either off-topic or maybeish, but better off at DIY.
This question though, is very much on-topic and would be a good fit here. This is also one of the 4 tagged
sod. Of the other three, these two are on-topic here. The former has a well upvoted accepted answer so, I think it's best to leave it there. We can take the latter, as the answer is not really an answer and might have a better chance of being answered here.