MZ 20" Pressure Manhole Covers, 25 PSI

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Knappco 20” full opening general purpose MZ Pressure Manhole for non-code applications for cargo tanks, industrial, and bulk storage tanks. For pressures up to 25 psi. Available Models:
  • MZ1110 20" Pressure Manhole Cover Carbon Steel Cover & Weld Ring Plated Steel Hardware and Buna Gasket