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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 concrete ring alternative manhole grade adjustment system available anywhere.

EEP is known for its ability to stand up to the harshest of conditions without damage or deformity for many years. Installed on tens of thousands of manholes and catch basins throughout the U.S. and Canada, these lightweight rings are renowned for their exceptional strength-to-weight ratio, durability, chemical resistance and long service life under the most demanding conditions.

PRO-RING vs. Concrete Grade Rings
  • SAFETY It usually takes two to 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 minimizes 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.
    Angle ring allows conformity to sloped road surfaces.
    • Cost effective over the long haul.
    Best Warranty in the industry.

Hundreds of thousands of PRO-RING units have been sold since first being introduced in January 2010.

Check out this big list of PRO-RING advantages.

Check out our brochure or contact us today so we can calculate your savings. 800-345-3764

New PRO-RING sizes

We’ve expanded our product line offering again!

We are excited to announce the addition of two highly sought sizes including angle and finish ring designs:

24” I.D. X 20” I.D. Rectangular
46” O.D. X 36” I.D. Round

The grade adjustment system is manufactured from expanded polypropylene (EPP), which has an exceptional strength-to-weight ratio and meets AASHTO HS-20 and HS-25 loading requirements. With a 50-year projected design life, the system is corrosion resistant and available in both square (34- by 34-inch outer and 24- by 24-inch inner) and rectangular (36- by 46-inch outer and 24- by 36-inch inner) profiles. Both the square and rectangular profiles are available in a variety of heights, including 0.75-, 1-, 1.25-, 1.5-, 2-, 3- and 4-inch. They also come in sloped versions.Made out of the same material as the bumper component hidden behind the fascia on a modern automobile, the Pro-Ring grade adjustment system acts as a shock absorber offering the highest quality product available.

Weighing from 3 to 12 pounds, the EPP system is approximately 1/20th the weight of comparable concrete systems, enabling one individual to install or repair a square or rectangular basin using construction adhesive. The grade system also can be layered for precise adjustment.

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