Manhole Risers (View Video)

	What's so Great about a Pivoted Turnbuckle?
	Our Manhole Adjusting Riser Rings feature a turnbuckle linkage pivoted at each end to provide the ultimate means to expand a manhole riser. This construction allows efficient application of a screw. A 60 lb. force applied 7'' from the center of the pivoted turnbuckle exerts a 5,600 lb. tangential force in the Manhole Adjusting Riser Rings that will be bent to fit the out of round, worn manhole opening. Thus, the Manhole Adjusting Ring is forced out against the casting along the full circumference with this efficient pivoted turnbuckle mechanism. Thus, the installation resembles a pressed-in bearing. A very reliable, inexpensive means to bring manholes up to a new grade. All thanks to our Manhole Adjusting Riser Rings! Below are more photos of our unbeatable manhole riser during the final stages of installation and paving. Our Expandable Manhole Riser, that features a pivoted turnbuckle, has a one inch diametric variance. Finally, we offer one day service for our Manhole Riser!