I’ve recently set up a 50 gallon rain barrel and connected it to a 1/10 hp hose pump to water some nearby planters every morning (see pictures below). When the barrel is close to full, there’s some static pressure and I’m getting continuous dripping out of the irrigation line when the pump isn’t running. Ideally I want water to come out only when the pump is running.
What can I add to the line to prevent the dripping unless the pump is on? I tried looking for some sort of “minimum pressure” valve but couldn’t find anything, not sure if that exists. Something passive would be preferable so I don’t have to add another electronic component to the system.