У вашего броузера проблема в совместимости с HTML5
Key points:
1. cheap: 10 adjustable drippers ~$3
2. avoid bending the hose when additional air lock will appear.
3. there is some minimal amount of water to start dripping.
4. my build is stable with 0.5 litre per 2 hours. attempts to make it slower create unstability for the next time irrigation.