My Wrekin


Tristar D400 hinged circular manhole cover 450mm diameter clear opening with 100mm frame depth

Stock code Range Overall frame
Clear opening
Frame depth
Base opening
Datasheet My Wrekin
DMS1D4/45D/KT Tristar Ø 620 mm Ø 450 mm 100 mm Ø 500 mm
  • The enlarged frame corners help to dissipate loads onto the foundation, providing a longer service life and increased reliability.

    Enlarged frame corners
  • Indexed covers ensure correct fit first time, every time.

    Indexed corners
  • Safety keyway prevents accidental disengagement of the lifting key during the handling process.

    Safety keyway
  • Safety-stop hinges prevent covers falling once opened.

    Safety stop hinges
  • Spring bar low security locking feature.

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

    PSRV tested



General information

Stock code
Primary material
Ductile iron
Manhole cover

Standards, classes and groupings

BS EN 124
BS EN 124 Class
BS EN 124 Group
Third party certified


Frame shape
Manhole shape
Overall frame (A x B)

x 620 mm

Clear opening (C x D)

x 450 mm

Frame depth (E)
Base opening (F x G)

x 500 mm


The use of Armadillo is recommended where exposure to construction site traffic is likely All values stated are nominal within 2.5% tolerance.


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YPCR/U12.5 UniPak Mortar 12.5Kg Unipak rapid curing polyester resin mortar
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GRITBLOCKER GritBlocker Anti-blockage keyway insert
SCREWLIFT ScrewLift Manhole cover levelling system
KEY/LONG Lifting Key Large cover lifting keys with a long handle (sold as a pair)
KEYS/L Lifting Key Small cover combined lifting key
KEYSHEAVY Lifting Key Large cover lifting keys with a standard handle (sold as a pair)
DREDRING/45/35 Reducer ring Reducer ring with a 350mm inner diameter and 460mm outer diameter

Knowledge base

1. Wrekin Products Ltd is continually seeking to improve our products and therefore reserves the right to alter product specifications without prior notice.
2. It is the responsibility of all users to satisfy themselves the above data is current.
3. Installation details are available on request.