KM 20" Non-Pressure Manhole Covers

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Knappco's KM 20” Non-Pressure Manhole for cargo tank, industrial & storage tanks. Available Models:
  • KM1110 20" Non-Pressure Manhole Cover Carbon Steel, Hardware & Weld Ring w/Buna Gasket
  • KM2210 20" Non-Pressure Manhole Cover SS304, Hardware & Weld Ring w/Buna