Grade Adjustment Rings

 
G SERIES 685mm ID/913mm OD

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Grade Rings are used to adjust the top elevation of the cast iron or steel frame and cover to the finished grade of the roadway.
BUTYL SEALANT joint material or TSS Gaskets are available to provide a watertight joint between the cover and the grade ring section.
H SERIES 750mm ID/930mm OD (Bell & Spigot)

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HR SERIES 685mm ID/1059mm OD
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F SERIES 900mm ID/1200mm OD
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SQGR Series 610mm ID/840mm OD
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