C-20 Cast Iron Canal Gates

Canal Gate with Capability for Both Moderate Seating and Low Unseating Heads

WATERMAN C-20 CAST IRON CANAL GATES offer reliable water control on canal and pipeline systems which operate at low and medium heads. They are built-to-last and designed for years of reliable service, offering a typical field life exceeding 40 years. These gates offer superior performance to “look alike” products and best-in-class construction available exclusively from Waterman.


  • Gray iron with minimum ¼” thickness
  • Computer analyzed for stress and deflection using finite element analysis
  • Superior rail material assures reliable performance and prevents deflection
  • Bolted steel frame with choice of standard painted steel, upgraded galvanized steel, or 304 stainless steel
  • Adjustable cast iron wedge blocks feature two machine bolts for dependable seating and water tightness
  • Machine-threaded stem provides ease of operation and extended life


  • Wide choice of mounting options and pipe adapters
  • Stainless steel frame, guide rails, and bolts
  • Stainless steel or brass stems
  • Epoxy, coal tar, or ASTM galvanized coatings
  • Extended stems; custom pitch and thread rotation; stem guides; limit nuts
  • Waterman Rising-Stem Extensions are factory installed to the height required, providing a rising stem and handwheel, keeping threads and lifts above the water level and allowing the amount of gate opening to be readily determined
  • Non-Rising Stem Extensions position the gate handwheel at convenient static operating elevations, eliminating hardware which might otherwise rise into traffic areas