Self-taught DIY-irrigator for 550m² (appx. 5,500sq.ft.) in Germany.

This is my lawn and irrigation system:

https://drive.google.com/open?id=1LJnpVw8ZFKJSs1hGB7ayCM-S-bn4dwN1

The irrigation is fed by deep-well pump. Design pressure: 55 psi, design water capacity: 13 GPM.