You can use a Gardena 3500/4 pump to boost irrigation pressure jeremycherfas.net
@jeremycherfas sounds like the opposite/reverse of a shower pump, which only kicks in when the output is opened 🚿
@cn Sort of. I want it to pump if there is flow, but it will do so only if it is on before there is flow. We shall see in the morning. Obviously a proper programmable socket would be better, but no time to get one.