Adding versatility to their PRO-RING manhole grade adjustment system, Cretex Specialty Products now makes angular shaped units. PRO-RING™ is the only manhole grade adjustment system made from Expanded Polypropylene (EPP). PRO-RING™ products provide an alternative to concrete grade or adjustment rings.

Patterned after the company’s circular Pro-Ring manhole grade adjustment system, the square and rectangular systems are designed to stop storm basin and curb inlet deterioration.

Weighing in at just 12 pounds, a 4″ PRO-RING™is much lighter than concrete – which can break and cause injury to workers. The PRO-RING™ system eliminates that hazard, helping reduce comp claims.

Installation is quick – the site is typically closed for only one day, and can reduce overall costs from 20% to 30%, based on conditions. Just a few simple tools are needed, and one man can easily install the PRO-RING™ system in just minutes. The rings nest together and include a finishing ring and a slope adjustment ring for a precision fit.