- Gravity-operated — no external power required
- Prevents backflow and flooding under reverse head conditions
- Elastomer-seated flap for bubble-tight sealing under back pressure
- Aluminum, stainless steel, and fiberglass reinforced plastic construction
- Available in circular and rectangular configurations
- Flush mounting flange for pipe end or headwall installation
450 Series Flap Gates
Whipps Series 450 flap gates are gravity-operated, one-way flow control gates used to prevent backflow and flooding in drainage and sewer outfall applications. The elastomer-seated flap design provides reliable, automatic closure under reverse head conditions, protecting drainage infrastructure from tidal, storm, or wastewater backflow without external actuation.
Features & Benefits
Applications
- Sewer and drainage outfall backflow prevention
- Tidal flap gate for coastal drainage
- Storm sewer outfall protection
- Combined sewer outfall flooding control
Performance
- Circular: 4" to 120" diameter
- Rectangular: custom sizes
- Aluminum, stainless steel, FRP construction
- Gravity-operated — no power required
About The Manufacturer
Founded in 1977, Whipps, Inc. has grown into a leading manufacturer of high-quality water control equipment and produces a wide range of water management solutions, including:
- Sluice/slide gates
- Stop logs
- Hand-pull stop gates
- Flap gates
- Shear gates
- Mud valves
- Telescoping valves
- Tilting weirs
The company’s commitment to excellence in manufacturing has been the cornerstone of its success for over four decades.
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