MJ 20" Pressure Manhole Covers, 18 PSI

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Knappco 20” full opening general purpose MJ Pressure Manhole for non-code applications for cargo tanks, industrial, and bulk storage tanks. For pressures up to 18 psi. Available Model:
  • MJ1110 20" Pressure Manhole Carbon Steel Cover & Weld Ring, Plated Steel Hardware and Buna Gasket