Square Covers For Circular Inspection Chambers (Video)

The CLK300 by Clark Drain is a top choice for drainage systems, featuring a square cover with a circular back, making it highly adaptable. Its concentric ring system allows a secure fit across leading mini access chamber brands like Marley, Hunter, Osma, and FloPlast.

Key Features:

  • Square-to-circular design ensures wide compatibility.

  • Easy installation with adjustable concentric rings.

  • Driveway-safe with 3500kN load rating, ideal for tarmac and concrete applications.

  • 400mm outer lip provides a robust installation surface.

Check out our video for a full review and installation guide!

Items you will need

  1. Polypropylene Manhole Cover and Frame Square - 380mm
    1. Code CLKS300
    £22.62 £27.14
  2. Polypropylene Manhole Cover and Frame Square - 580mm
    1. Code CLKS456
    £46.06 £55.27
  3. FloPlast Inspection Chamber Set - 300mm Diameter
    1. Code D300MH1
    £81.46 £97.75
  4. FloPlast Inspection Chamber Set Internal Use - 300mm Diameter
    1. Code D300MH3
    £102.49 £122.99