T-6 is the standard-duty U shape drain, suited to pedestrian and light-vehicle areas; T-25 is the heavy-duty option, engineered for carriageways, industrial yards and infrastructure sites where heavier axle loads cross the channel.
Choosing between the T-6 and T-25 U shape drain comes down to one question: what’s going to cross the channel?
T-6: standard-duty drainage
T-6 U drains are designed for footpaths, residential layout drainage, light-vehicle parking and access areas, and general site perimeter drainage. See the T-6 product page for reference dimensions across the standard nominal size range.
T-25: heavy-duty drainage
T-25 U drains are designed for locations where vehicles with heavier axle loads pass over or alongside the channel — carriageways, industrial yards, and infrastructure or utility corridors. See the T-25 product page for reference dimensions.
How to decide
| Situation | Recommended class |
|---|---|
| Footpath or pedestrian zone | T-6 |
| Residential internal road, light-vehicle parking | T-6 |
| Carriageway-adjacent drainage | T-25 |
| Industrial yard with truck circulation | T-25 |
| Uncertain / mixed traffic | Confirm with the technical team |
A note on getting it right
Specifying too light a load class risks premature damage to the lid or channel; over-specifying adds unnecessary cost. Share your project’s traffic and axle-load expectations with the 3Bro Precast technical team before finalising a size and class.
