Silent Knight D400

I seem to recollect from a house I used to live in, which had one of these in the road, that if not fixed traffic makes these lids go bang bang.  A little annoying and keep you awake at night if the drain is line with your house!


Silent Knight D400

Available in clear openings 1210×685 or 1825×685 and 100mm or 150mm frame depths, Silent Knight D400 offers consistent high performance in all conditions.

Silent Knight D400 is rated to EN124 Group 4 D400 load classification.


Recommended for use in trunk and city roads carrying continuous fast moving traffic.

  • Class D400
  • Group 4
  • Motorway Application
  • Truck Application

Standards & Approvals

  • Kitemark
  • HA 104/09
  • SFA 7
  • CESWI 7

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Silent Knight D400 access cover

Key Features & Benefits

  • Double triangular Non-rock design
  • Skid resistant radial chequer design
  • Frame lifting points
  • LTS installation and durability features
  • Customer specific or generic badging available
  • Anti-theft locking options
  • A range of Safety Grids are available

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