D400 solutions

Round, hinged, robust manhole covers, utilising our unique anti-debris technology to ensure a simple and easy lift every time.

Ideal for scenarios that require extra-large D400 manhole covers. Hercules offers a cost-effective alternative to fabricated steel solutions.

Highway 3 flanges gully grates are designed and manufactured to meet the enhanced requirements of Highways England’s Design Manual for Roads and Bridges.

Highway gully gratings with 4 flanges meet the enhanced requirements of Highways England’s Design Manual for Roads and Bridges (DMRB) specification CD 534 v0.1.0

The most diverse range of D400 manhole covers with a large variety of sizes and options available suitable for almost every need.

Our Highway D400 surface boxes come with indexed covers, enlarged frame corners and are 70+ PSRV tested.

Ideal for use in carriage surface water drainage channels with a 1:5 shaped profile. The design incorporates a spring lock, safety lifting keyway and captive anti-theft hinges.

Highway HaloHinge D400  features a Hinge and Lift Out mechanism for safe cover removal using lifting keys. The covers also hinge to 100 degrees and lock securely for improved safety.

Tristar gully gratings address many issues related to cost-effective products. Designed to suit all existing gully pot styles and will sit over a typical 450mm Ø circular or horseshoe chamber.

Tristar D400 ductile iron access covers fully comply with BS EN 124:2015 and carry the BSI Kitemark. Tristar contains innovative design features that mark it out from the competition.

Tristar D400 surface boxes provide a cost-effective and compliant solution for stap tap and hydrant access points in D400 group 4 installation locations.

Our premium Unite D400 gully grate combines new technology with proven features to deliver a super long-life and the lowest whole-life cost of any D400 gully grate.

Simply the best performing D400 manhole cover on the market. These covers are full of features that combine to give the longest life and the lowest whole life cost of any range available.

Offers a LPCB level 3 version 8 security for valuable communication assets, which are particularly important in the development of smart motorways and the control of matrix signs.