Features & Benefits

WATERMAN F-20 MEDIUM DUTY FLAP GATES are designed for applications with maximum 20 foot seating heads.

Key Features:

  • Cast iron frame and cover
  • Machined seating surfaces for tight closure
  • 2.5 degree seating angle and double pivoted links for positive closure
  • Field-adjustable hinge brackets allow sensitivity adjustment
  • Lifting eye in cover for manual operation for maintenance
  • Standard bronze hinge bushings; stainless steel hinge pins, studs and nuts
  • Flatback frame, mounting bolts sold separately


  • Bronze or stainless seats
  • Monel or brass hinge pins, studs and nuts
  • Stainless steel, ductile iron or manganese bronze hinge links
  • Graphite impregnated bronze bushings
  • Custom coatings including epoxy, coal tar or total galvanizing