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MainGuard Model 77

MainGuard Model 77

The MainGuard Model 77 provides the best in performance and value. It is our number one seller in the Ontario market. Designed and engineered specifically for flushing, the Model 77 provides excellent flow rates for improving chlorine residual levels and flushing disinfection by-products to keep water safe for consumers. The unique valve design allows for a full clear-channel flow that is superior to other blow-offs for moving water and passing debris easily. The Model 77 plunger is also designed to allow for throttling the flow of water while at the same time covering the drain hole to avoid unnecessary erosion. The MainGuard Model 77 provides the following features and benefits:

  • All brass principle working parts
  • CSA 2 ½” hose connection
  • Traffic break-away
  • Self-draining non-freezing capability
  • Inlet connection - 2” FIP
  • Locking security cover
  • Available in various depths of bury from 4ft to 7ft
  • Fully serviceable from above ground


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