Clark-Drain CD790R Recessed Manhole Cover 600×450mm – 65mm Tray

Description

The Clark-Drain CD790R is a rectangular recessed manhole cover and frame designed to provide access to an inspection chamber beneath a block-paved or landscaped surface.

Instead of leaving a conventional solid cover visible, the recessed steel tray can be filled with suitable paving material. This allows the access point to coordinate more closely with the surrounding surface while retaining access to the chamber below.

Important sizing information

The stated 600×450mm measurement refers to the clear opening beneath the cover. It is not the complete external size of the product.

• Clear opening: 600×450mm
• Overall cover and frame size: 695×545mm
• Overall depth: 78mm
• Internal tray depth: 65mm

Before ordering, measure the clear opening of the inspection chamber as well as the available space surrounding it. The complete 695×545mm frame must fit and be properly supported around the chamber opening.

65mm recessed paving tray

The CD790R has an internal tray depth of approximately 65mm. It is intended for recessed paving applications, including installations using suitable block paving or paviors.

The chosen paving and bedding construction must fit within the tray while allowing the completed cover to remain level with the surrounding surface. The lifting points must also remain accessible after the tray has been filled.

Confirm the complete paving build-up with the installer before ordering. The suitability of a particular slab, block or paving system depends on its thickness, bedding method and the required finished level.

Galvanised steel tray and polypropylene frame

The recessed tray is manufactured from fully galvanised steel and is supplied with a polypropylene frame. The frame includes a moulded grouting flange to assist installation and support around the surrounding construction.

Integral lifting keys are included with the cover. These allow the filled tray to be lifted when access to the inspection chamber is required. Keep the lifting points clean and unobstructed during installation.

Understanding the 10T GPW rating

Clark-Drain classifies the CD790R at 10 tonnes gross plated vehicle weight and identifies it for domestic driveway loading when installed correctly.

This rating must not be interpreted as the cover accepting a concentrated ten-tonne load directly onto one wheel or one point. Gross plated weight refers to the total rated weight of a suitable road vehicle under the manufacturer’s stated conditions.

Actual suitability depends on:

• The supporting inspection chamber
• Frame bedding and surrounding construction
• Installation quality
• Traffic type
• Wheel loading
• Vehicle speed
• Intended location

Seek technical advice where the cover will experience unusual, commercial or non-pneumatic traffic.

Installation considerations

The performance of a recessed manhole cover depends on the cover, frame and supporting construction working together. The frame must be evenly supported and installed level with the completed paving surface.

Before installation:

1. Measure the inspection-chamber clear opening.
2. Confirm that a 600×450mm clear opening is required.
3. Check that there is room for the 695×545mm external frame.
4. Confirm the required finished paving level.
5. Check that the paving and bedding system fits within the 65mm tray.
6. Ensure that the frame can be fully and evenly supported.
7. Keep the lifting keys and lifting points accessible.

Follow the current Clark-Drain technical and installation guidance. Where there is uncertainty about chamber support, vehicle loading or the paving build-up, use an experienced drainage or paving installer.

Delivery and damage checks

Inspect the cover and frame as soon as they arrive.

Check:

• The galvanised steel tray
• The polypropylene frame
• The lifting keys
• The lifting points
• The product dimensions
• Any signs of transit damage

Report any damage before installation and within the stated notification period.

Frequently asked questions

What does 600×450mm refer to?

It is the clear opening beneath the cover. The complete cover and frame measure approximately 695×545mm.

How deep is the recessed tray?

The CD790R has an internal tray depth of approximately 65mm and an overall product depth of approximately 78mm.

Is the CD790R suitable for a driveway?

Clark-Drain identifies the CD790R for domestic driveway loading when the cover, frame and supporting construction are correctly installed for the intended traffic.

What does 10T GPW mean?

It means ten tonnes gross plated vehicle weight. It relates to the total rated vehicle weight under the manufacturer’s stated conditions and is not a ten-tonne concentrated point-load rating.

Are lifting keys included?

Yes. The CD790R is supplied with integral lifting keys for removing the recessed tray.

Can the tray be filled with paving?

Yes. It is designed as a recessed block-paving cover. Check that the selected paving and bedding construction fits within the 65mm tray and allows the finished cover to remain level.

What is the manufacturer’s product code?

The Clark-Drain model reference is CD790R. The current Stone & Porcelain SKU is 00533.

How do I check whether it will fit?

Measure both the inspection-chamber clear opening and the external space available for the frame. You need a 600×450mm clear opening and enough surrounding space for the 695×545mm frame.

Additional Information

Manufacturer	Clark-Drain
Model	CD790R
Product type	Recessed manhole cover and frame
Clear opening	600 × 450mm
Overall dimensions	695 × 545 × 78mm
Internal tray depth	65mm
Material	Galvanised steel tray and polypropylene frame
Load classification	10T gross plated vehicle weight
Lifting system	Integral lifting keys included
Intended application	Block paving and correctly constructed domestic driveways
Stone & Porcelain SKU	00533