Double siphoning system

A locking system in 4 points

Download our documentation (pdf)



Hermelock manhole covers are made of Polyurethane, reinforced with fiberglass with matching frame made of reinforced Polypropylene.

Advantage product

  • Watertight to drainage water by double siphon system.
  • Resisting loads according to the standards EN-124 class D400
  • Anti slippery design with little noise
  • A smell-proof sealing (Double siphoning system)
  • A locking system in 4 points
  • Colour: Black

Composite material

Place of installation
Group 4, class D400 →see EN124
Carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles


  • Full watertightness and gas tightness can be obtained by putting additional sealing.
  • Marking/logo on request
  • Key KE2, KE3, KE4

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