Description
The
320mm screw down manhole cover from
Competa CMLR320 provides a practical cover and frame for compatible 320mm underground inspection chambers. Listed as a
3.5t manhole cover, this product uses a screw-down design and is supplied as a
non sealed chamber cover for installations where accessible drainage inspection is required. It can also provide a useful
replacement 320mm chamber lid where compatibility with the existing chamber riser and frame arrangement has been confirmed. The removable cover allows the drainage chamber below to remain accessible for inspection, maintenance and rodding.
320mm Screw Down Manhole Cover
The
320mm screw down manhole cover forms the finished upper access point of a compatible underground inspection chamber. Once the chamber base and required risers have been installed, the cover and frame sit at the top of the chamber and provide removable access to the drainage system below. The screw-down arrangement helps secure the cover into its frame while still allowing it to be removed when maintenance or inspection is required. This model is intended for 320mm chamber applications. Compatibility should always be checked when fitting a cover to an existing chamber, particularly where the original chamber components are from a different system or manufacturer.
Competa CMLR320 Cover & Frame
Competa CMLR320 is the Speedy Plastics product identification used for this 320mm cover and frame. It allows this particular cover to be distinguished from the other round and square 320mm chamber covers available within the same drainage category. The underlying stock reference used by Speedy Plastics is MLR320, while CMLR320 is retained in the customer-facing Competa product naming. When replacing an existing cover, checking the product reference as well as the nominal chamber diameter provides greater confidence that the correct component has been selected.
3.5t Manhole Cover
This product is stocked and sold by Speedy Plastics as a
3.5t manhole cover. The stated loading should always be considered alongside the actual installation conditions and expected traffic over the chamber. A
3.5t manhole cover should not automatically be assumed suitable for every driveway, roadway or trafficked application purely from its nominal load description. The required cover classification depends on the installation, support and loads that may be applied to the finished chamber. If the chamber is located in an area subject to significant vehicle loading or other demanding conditions, check the project requirements before installation and select a suitably rated cover where necessary.
Non Sealed Chamber Cover
The CMLR320 is supplied as a
non sealed chamber cover. This distinguishes it from chamber-cover arrangements which incorporate dedicated sealing systems between the lid and frame. A
non sealed chamber cover can be suitable for many standard underground drainage inspection applications where a sealed lid arrangement is not specified. Always consider the location and requirements of the individual drainage installation before choosing between sealed and non-sealed cover options.
Replacement 320mm Chamber Lid
The CMLR320 can also be considered as a
replacement 320mm chamber lid where an existing compatible cover has become damaged, lost or needs replacing. When selecting a
replacement 320mm chamber lid, do not rely on nominal diameter alone. Check the existing riser, cover frame, fixing arrangement and physical fit before installation because different 320mm chamber systems are not necessarily interchangeable. Where an existing frame is damaged or compatibility is uncertain, replacing the cover and frame together may provide a more appropriate solution than attempting to fit an unrelated lid into an existing frame.
Screw Down Access for Underground Drainage
The removable screw-down cover provides access to the inspection chamber below for routine drainage inspection, maintenance and rodding. Inspection chambers are positioned within underground drainage systems so changes of direction, junctions and other key points can remain accessible after the pipework has been installed. Keeping these access points usable can make future drainage maintenance considerably easier without disturbing the surrounding underground pipework.
Choosing the Correct 320mm Chamber Cover
Before ordering the
320mm screw down manhole cover, check the nominal chamber size, existing riser arrangement, required cover type and expected loading at the installation location. The
Competa CMLR320 is the non-sealed screw-down option in this range. Other 320mm products are available with alternative cover shapes, frame designs, sealing arrangements and load specifications. This makes it important to choose the cover according to the actual chamber and installation rather than simply selecting the first product described as 320mm.
320mm Screw Down Manhole Cover Key Features
- Competa branded 320mm chamber cover
- Product identification: CMLR320
- Underlying stock reference: MLR320
- Screw-down cover design
- Cover and frame supplied together
- Non-sealed cover arrangement
- Stocked by Speedy Plastics as a 3.5t cover
- Designed for compatible 320mm chamber applications
- Provides removable inspection and maintenance access
- Suitable for replacement applications where compatibility is confirmed
Complete Your 320mm Inspection Chamber
Browse our
110mm x 320mm manhole inspection chamber range for chamber bases, risers, seals and alternative cover options. For general guidance covering below-ground drainage, manholes and inspection chambers, see the official
Approved Document H – Drainage and Waste Disposal. The
320mm screw down manhole cover provides a
Competa CMLR320 option where a
3.5t manhole cover,
non sealed chamber cover or compatible
replacement 320mm chamber lid is required.
