Manhole Riser Rings - Ductile Iron

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Manhole riser rings designed to meet the City of Winnipeg Standard Construction Specifications AP-007. The lifter rings are designed to fit the WD50F and are available in 1.5", 2", 2.5" and 3" heights. Conforms to City of Winnipeg Standard Drawing SD 107A. For use with WD50F manhole frame or Titan TF-101 manhole. Show more