@NathanG - Yeah, I know what you mean. I also have a drip irrigation system to water my plants, and it uses check valves as well. I like it because during the summer it gets really hot, and if I just dose my plants with water I can really waste a lot of water.
The drip irrigation uses a gradual drip method directed at the base of the plants. I also use a liquid fertilizer that gets applied to the base of the plants at the same time, using the same method.
I conserve water and the plants are getting targeted nutrition and irrigation. They’ve grown much better than they did when I just splashed water on the surface, like I used to do.