View a Manhole Diagram by Selecting a Size:   -Select Size Here- 36" I.D. Sewer Shafting 48" I.D. Sewer Shafting 60" I.D. Sewer Shafting 72" I.D. Sewer Shafting 84" I.D. Sewer Shafting 96" I.D. Sewer Shafting 108" I.D. Sewer Shafting 120" I.D. Sewer Shafting 144" I.D. Sewer Shafting