PRO-RING now in angular shapes. Get the most advanced concrete-alternative manhole grade adjustment system available today–now available for square and rectangular structures.
PRO-RING™ is the only manhole grade adjustment system made from Expanded Polypropylene (EPP). PRO-RING™ products provide a proven alternative to concrete grade or adjustment rings and is the most advanced adjustment system available anywhere. The material is renowned for its ability to stand up to the harshest of conditions without damage or deformity for many years.
- SAFETY – It usually takes four men to lift a concrete grade ring, each one risking back injury. A 6″ PRO-RING™ weighs only 14 pounds. Where concrete rings break and can cause injury, the PRO-RING™ system eliminates that hazard, helping reduce comp claims.
- EFFICIENCY – One man can easily install the PRO-RING™ system in just minutes. People are always amazed at our demonstration. The rings nest together and include a finishing ring and a slope adjustment ring for a precision fit.
- FAST AND COST EFFECTIVE – PRO-RING™ products speed manhole installation and repair dramatically, allowing the site to be closed in one day and reducing overall cost from 20% to 30% based on conditions. No water, sand mortar or bricks are needed, just a few simple tools.