History of Flap Valve
| Element | Description | Element Code | Essential | Uniclass 2015 | Updates |
|---|---|---|---|---|---|
| Flap Valve | A flap that prevents back flow into an outfall | FVE | No | 25-02-2020 | |
| 27-04-2021 | |||||
| Flap Valve | A non-return valve which is hinged on one side, and closes under a head of water to prevent backflow. | FVE | No | Pr_65_54_94_29 | 27-04-2021 |
| Flap Valve | A non-return valve which is hinged on one side, and closes under a head of water to prevent backflow. | FVE | No | Pr_65_54_94_29 | 11-04-2023 |
| Flap Valve | A non-return valve which is hinged or pivoted, and closes under a head of water to prevent backflow. | FVE | No | Pr_65_54_94_29 | 26-02-2024 |