Photo 1 of 2'' Check Valve - Backdraft Damper - 2 inch Non-Return Damper Flap to Connect PVC Pipe or Hose - Perfect for Use in Flue, Sewer Pipeline, Bathrooms, Ventilation Systems, 2inch Horizontal

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Photo 1 of 2'' Check Valve - Backdraft Damper - 2 inch Non-Return Damper Flap to Connect PVC Pipe or Hose - Perfect for Use in Flue, Sewer Pipeline, Bathrooms, Ventilation Systems, 2inch HorizontalPhoto 2 of 2'' Check Valve - Backdraft Damper - 2 inch Non-Return Damper Flap to Connect PVC Pipe or Hose - Perfect for Use in Flue, Sewer Pipeline, Bathrooms, Ventilation Systems, 2inch HorizontalPhoto 3 of 2'' Check Valve - Backdraft Damper - 2 inch Non-Return Damper Flap to Connect PVC Pipe or Hose - Perfect for Use in Flue, Sewer Pipeline, Bathrooms, Ventilation Systems, 2inch Horizontal