DUOSEAL® Watertight Access Assembly

DUOSEAL Watertight Access Assembly

Watertight manhole cover and frame prevents inflow and overflow


Prevent discharges, protect against inflow, and suppress odors with DUOSEAL® watertight access assembly.

The DUOSEAL access assembly is ideal for flood prone areas or to prevent unwanted fluids from overflowing due to a surcharge in the system. 

The bolted, dual-gasket design creates a watertight barrier to contain manhole structures and prevent inflow or overflow. The assembly has been tested to EJ Watertight Level 8 (L8), meaning it can withstand 3 1/2 atmospheres of pressure (51.45 psi), which is the equivalent of having approximately 118 ft of water on top of the manhole assembly.

Standard Features:

  • Heavy duty rated
  • Watertight (L8)
  • Closed pick bars
  • Dual 3/8" diameter round neoprene gaskets
  • Ductile iron cover with gray iron frame
  • Stainless steel bolting
  • Made in the USA


  • Special lettered covers
  • Custom logo covers
  • Security bolting

Sizes Available:

  • 24" clear opening (7" frame height)
  • 30" clear opening (4 1/2" frame height)

Learn More

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