Visual Inspection Process
- Remove access cover carefully
- Use flashlight to examine valve interior
- Inspect for debris, damage, and wear
- Check pipe connections for leaks or gaps
- Verify valve orientation is correct
- Document any issues with photos
Mechanical Function Testing
- Gently push flap/gate to test movement
- Release to verify automatic return
- Check for smooth operation without binding
- Verify seal is complete when closed
- Test manual override if applicable
- Check any alarm systems connected to valve
Flow Testing Procedure
- Pour clean water upstream of valve
- Observe water flowing through valve
- Verify flap/gate opens with normal flow
- Check for any leaks during flow
- Confirm flap/gate returns to closed position after flow stops
- Document drain time and any irregularities
Cleaning and Maintenance
- Use gloves and eye protection
- Remove debris with appropriate tools
- Clean flap/gate with mild cleaner and water
- Lubricate moving parts per manufacturer specs
- Sanitize valve area if necessary
- Replace cover securely after service