Anti-drain valves are installed in overhead sprinkler head systems to prevent sprinkler heads from dripping and leaking once system has been turned off, allowing uniform watering.
They also ensure that all sprinklers turn on at the required pressure.
They are available in Male x Female Press Fit Connections.
| bar | bar | bar | bar | |
| Anti-Drain Valve | Blue | Purple | Green | Orange |
| Opening Pressure | 1.5 | 2 | 3 | 4 |
| Closing Pressure | 0.7 | 0.9 | 1.5 | 1.8 |
It is recommended to have an extra 0.2 bar of pressure to ensure the opening of AD Valve.
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