Inspection Chamber Manhole Cover and Frame (Driveway) 450mm 50kN

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£73.52 Incl. VAT
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Product Description

Manufactured from hardwearing and durable polypropylene, Brett Martin’s heavy duty Lids and Frames provide a robust and secure solution for residential applications. The strong webbed design delivers a substantially stronger lid capable of withstanding a maximum loading of 50kN (when supported by a concrete plinth).

The Lids and Frames are fully compatible with Brett Martin SfA7 Adoptable and Non-Adoptable Inspection Chambers. Tested to EN124 A15 and in conformance with Building Regulations, the Lids and Frames have the seal of approval.

Combining flexibility with ease of installation, the 450mm Inspection Chamber Assembly includes 450mm dia chamber base, 300mm deep riser, cover and frame, sealing rings and chamber reducer. Providing more on site solutions the 450mm Chamber Base options are available for both 110mm and 160mm drainage layouts, with branch outlets designed to optimise flow direction.


  • Chamber base options for 110mm and 160mm drainage layouts.
  • Watertight push-fit inspection chamber assembly.
  • Robust ribbed risers feature connecting lugs for a stable assembly.
  • Chamber reducer for added safety during inspection.
  • Cover withstands 50kN load for driveway use.
  • Secured lid in frame reduces risks of accidents, injury and removal.
  • Meets requirements Building Regulations Part H1.


Diameter: 450mm

Product Documents


Diameter 450mm Material Polypropylene

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Inspection Chamber Manhole Cover and Frame (Driveway) 450mm 50kN

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