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We manufacture grey cast iron and ductile iron manhole riser rings / extension rings / repaving rings / paving riser rings as well as fabricated mild steel riser rings.
Manhole Riser Rings - Overview
- Available in Grey Iron, Ductile Iron and Fabricated Mild Steel
- All castings are available in ASTM A48 Class 35B
- Steel Riser rings are made of ASTM A36 steel and galvanized as per ASTM A123 (if required)
- Available in Repaving heights ranging from less than 1" to 6" for different sizes of Manhole openings
- Fabricated Mild Steel Riser Rings are specially designed to allow for small variances in Manhole Rings
- Also available for Valve Boxes
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