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Unite™ E600 Manhole Covers

Simply the best E600 access cover range available in the market, in fact it's so good Unite is available with a 10 year warranty*. Packed full of design features that combine to give Unite the longest life and lowest whole life cost of any E600 access cover available. Designed and manufactured to exceed BS EN 124 and Highways England’s Design Manual for Roads and bridges (DMRB) specification CD 534 v0.1.0.

Unite E600 Product Render

Unite E600 manhole covers provide increased strength to the cover and structure, as well as enlarged frame corners that help to dissipate loads. These features work together to ensure Unite E600 has minimal movement in the ground – increasing longevity. The increased flange area provides a bearing pressure under test load of no more than 2.1N/mm2, adding another level of consideration for road environment requirements advised by Highways England.

The anti-slide feature helps to prevent movement or sliding within the frame and minimises seat wear, further increasing the life of the product.

The Unite range as a whole offers the most mortar-sympathetic frame arrangement available, employing a textured flange, which utilises the mechanical properties of bedding mortar rather than just the adhesive characteristics. The flange edge is deliberately round profiled, eliminating crack induction in surrounding bedding materials. All of this combines to ensure the longest operational life of any UK double triangular chamber top. In fact, we're so confident in Unite's performance, it's available with a 10 year warranty*.

BS EN 124, CD 534 v0.1.0, Kitemark


Engineered for an exceptionally long life:

  • Available with a 10 year warranty
  • The Unite range has been in service on highways for over 20 years
  • Over 500,000 installations with zero reported failures
  • A unique cover design substantially reduces seat wear
  • Frame features that are sympathetic to bedding materials
  • Fully compliant with BS EN 124-2:2015
  • Complies with CD 534 v0.1.0, DMRB, MCHW and Series 500
  • Kitemarked by BSI
  • 100% recyclable product

Square or rectangular manhole covers

Stock code Range Clear opening
(mm)
Overall frame
(mm)
Frame depth
(mm)
Options My Wrekin
DMT0E4/6060/KUE Unite 600 x 600 880 x 880 100
DMT0E4/6767/KUE Unite 675 x 675 945 x 945 100
DMT0E6/6060/KUE Unite 600 x 600 880 x 880 150
DMT0E6/6767/KUE Unite 675 x 675 945 x 945 150

Square to round

Stock code Range Clear opening
(mm)
Overall frame
(mm)
Frame depth
(mm)
Options My Wrekin
DMT0E6/6060/KUESQR Unite Ø 600 880 x 880 150
Unite 10 year warranty

Unite 10 year warranty

When installed with either our Unipak polymer resin bedding mortar, or Instarmac Envirobed® CD534 flowable bedding mortar, the Unite range is available with a 10-year product warranty*.

Due to its unique design and overwhelming success in the local authority and utilities sector, Unite is the proven choice for durability and longevity for highway ironwork installations.

View further warranty information

* Subject to terms and conditions

Packed full of features

  • 70+ PSRV tested at top surface of chequer by UKAS accredited 3rd party.

    PSRV tested
  • GritBlocker™ anti-blockage keyway insert comes pre-installed.

    Anti-blockage keyway
  • The covers feature a universal beam (also known as an I beam) providing significant improvements to rigidity, reducing seat wear for an enhanced service life.

    Universal beam icon
  • The high seating position ensures that forces are transmitted more directly downwards, meaning conversion of traffic loads into mortar-compatible compression forces.

    Cover support geometry
  • The enlarged frame corners help to dissipate loads onto the foundation, providing a longer service life and increased reliability.

    Enlarged frame corners
  • Mechanical lifting points are provided.

    Mechanical lifting point
  • Safety keyway prevents accidental disengagement of the lifting key during the handling process.

    Safety keyway
  • Keyway lifting points are provided on the frame for safe handling.

    Keyway lifting point in the frame
  • A retrofittable ID badge can be fitted, also compatible with antennas and communication options (RFID, NFC, IoT)

    Retrofittable badge
  • Unite is available with a 10 year warranty (subject to terms).

    Unite 10 year warranty
Unite manhole cover installed in Piccadilly Circus
Traffic on a busy London road

> 1,500 Annual Average Daily Traffic (AADT)?

With the introduction of CD 534 there were several key changes. This includes the requirement for E600 manhole covers to be installed in place of D400 covers where the Annual Average Daily Traffic (AADT) of light goods vehicles travelled on a road is greater than 1,500 in each direction.

As a "rule of thumb", most A roads will have an annual average daily traffic number over 1,500 light goods vehicles.

Full traffic data can be found for many locations around the UK on the Government website.

Unite textured mortar engagement flange and bevelled edge
Textured flange surface

Fit and forget

Unites flange surface provides a textured finish for bedding mortar to adhere to and the mortar holes allow for interlocking between both sides. This allows Unite to utilise the mechanical properties of bedding mortar, not just its adhesive characteristics.

The built in a bevelled frame edge as standard, prevents sharp edges from cutting into and breaking mortar away over time, as vibrations from traffic are transferred into the foundation.

These unique mortar-sympathetic, and advanced design features, allow Unite installations to stand the test of time in extreme environments.

Unite E600 with No Leak seal plate
Seal plates

Retrofit as standard

Low leak and No leak seal plates can be retrofitted to the Unite range as an optional extra. This enables contractors to simply return to an installation and install the required sealing plate with minimal disruption and inconvenience caused.

With the recent increase in the amount of foul waste entering storm drains, Unite provides a simple solution to reduce the impact of foul waste and surface water entering storm drains.

A high-pressure, no leak seal plate is also available as a factory fitted item.

Unite universal beam
Universal beam

A strength above the rest

Our high rigidity support beams, based on 'Universal Beam' technology, result in lower seat wear, improved longevity and lighter covers.

Developed using advanced computer modelling and testing, this technology, incorporated in bridge and building construction, offers maximum strength and stiffness, dissipating the effects of forces exerted from high volumes of traffic. It also ensures that wear of cover seating is minimised (where the cover meets the frame), which is a common cause of failure in many rival covers.

This all combines to provide the longest service life possible for the whole structure.

Retrofittable identification bolt being installed in a Unite access cover
Only with Wrekin

Retrofittable badging and antenna options

Unite* and Highway access covers are the only ranges on the UK market to include provisions for communications equipment, such as antennas, to be installed within the cover.

Antenna in cover linked to hardware in chamber

The ID bolt provision can be used for antennas, allowing communications equipment, such as water meter monitoring, to be installed within a chamber beneath a cover whilevproviding a strong signal above ground without the need to dig or adjust the surrounding road surface. Saving significant time, effort and money while minimising disruption.

* references ending /KUE

D400 VS E600

There are several advantages available when increasing the load classification from D400 to E600, including:

Frame bedding area is increased, and thanks to the great frame design featured in Unite, it results in a reduction in applied compression bedding stress during trafficking. Increasing the longevity of the product and installation.

Stiffer covers for the same traffic loads. In Unite cover designs the benefit is a reduction in movement at the cover to frame contact points, which results in lower ‘seating’ wear and longer seating life.

A greater factor of safety against traffic loads.

E600 products are more likely to be resistant to unintended traffic loads e.g. pre-service loads as commonly found on construction sites which can result in damage to installed ironwork.

Related case studies

Related case study

Junction 9 improvements for the M27

Wrekin secured the exciting opportunity to supply Unite manhole covers and ironwork installation systems to the county’s most significant infrastructure project in recent history. Hampshire County Council and Highways England have committed to funding a £23m infrastructure project, which will improve the M27 and benefit motorists for years to come.

MJ Church
MJ Church
Read more
Related case study

Unite(d) at Sunderland City Council

Sunderland City Council is responsible for the maintenance and repair of most roads and bridges in Sunderland. Like so many highway authorities, it had been receiving complaints from residents about noisy manhole covers. They immediately suggested Wrekin Products’ Unite manhole covers, which in addition to eliminating displacement under heavy traffic, as J T Dove explained, offer a range of other benefits.

Sunderland City Council
Sunderland City Council
Read more

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Whether you are looking for live project support, or are in the initial stages of specification, we are always on hand and happy to help.