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| Element | Description | Element Code | Essential | Uniclass 2015 |
|---|---|---|---|---|
| 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 |
Department for Environment Food & Rural Affairs
| Element | Description | Element Code | Essential | Uniclass 2015 |
|---|---|---|---|---|
| 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 |