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B&Q£134.99Visit shop - Clark Drain T16G3 Sealed & Locking Recessed Manhole Cover Overall Size Including Frame 740mm X 740mm X 58mm
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The Clark Drain T16G3 is designed for homeowners and contractors looking to conceal access points in driveways, patios, or pathways with a professional, flush finish. Its primary benefit is a high-security, double-sealed design that effectively prevents odors and water ingress while supporting up to 5 tonnes of load. A key caveat is that this unit requires a concrete or screed infill into the tray, meaning it is not a 'drop-in' solution if you require an immediate surface finish without additional wet-trade labor.
| Model Part Number | T16G3 |
|---|---|
| Brand | Clark Drain |
The T16G3 is rated for a maximum gross plate weight (GPW) of 5 tonnes.
Yes, it features an integrated rubber gasket that provides a double seal against odors and water.
Yes, it is designed for residential driveways and light commercial applications.
The clear opening size is 600mm x 600mm.
The cover is made from galvanised steel, which is highly resistant to corrosion in outdoor environments.
You will need a screwdriver or hex key suitable for the stainless steel screws holding the cover in place.
Ensure the screws are fully unscrewed and the frame is free of built-up dried mortar or dirt around the edges.
Inspect the rubber gasket for gaps or damage and clean any debris that may be preventing a full seal.
Ensure the infill was not subjected to weight before the concrete or screed had fully cured.
Before installation, ensure the opening is cleared of debris and the frame is level. The frame should be set into a mortar bed to ensure stability. Once the frame is secure, fill the tray with your chosen material (e.g., concrete, screed, or thin pavers) level to the top edge. Allow the infill to reach full strength according to the material manufacturer's curing guidelines before applying weight. To maintain the unit, check the stainless steel screws periodically to ensure they remain tight and clear of grit. Clean the perimeter gasket annually with a damp cloth to ensure a consistent, airtight seal.
