I can't remember if I've mentioned this before, but until now I've not been able to link videos. It might be of interest to some with small gardens like ours.
I put these in about 8 years ago. They run on mains pressure I think the heads were about £7 each on eBay. Total cost including the speed-fit pipe work, about £50.
Not affected by frost in the winter as it's all plastic.
I put them in, in about three hours one afternoon.
"Dry run" well... wet run to see if they would work.
"V" shaped wedges removed and replaced over the pipework. Scars disappeared in two weeks.
Control valve. I had some sand and cement to remake the path after laying the supply pipe under it.
Here's the video.
https://www.youtube.com/watch?...