Found a bag of these plugs at the bottom of the box with sprinklers.
I had no idea they existed and was naively plugging the sprinkler hoses directly into the lateral pipe. That worked, but wasn't very secure. These plugs are more difficult to plug in, but also seem a lot harder to unplug themselves. I can flush single sprinkler lines at full pressure now without them going out!
#irrigation #permaculture #dyi #learnasyougo