For new construction projects in areas with acidic soils, keeping curb boxes in good working order is critical to avoid compromised water service, angry customers, and costly repair and replacement.
Traditionally, a curb box is composed of a metal tube that connects the cast iron base to a cast iron lid/cap. It is necessary for water line repairs and shut off in case of flooding. Typically, they are buried six to eight feet below ground, beneath the frost line. Curb boxes are found on every water line that connects a building to a city water main.
One major challenge is that many areas across the United States—including the East Coast, South, upper Midwest and Pacific Northwest—have acidic soil that rapidly corrodes cast iron infrastructure, including curb boxes. Soil with a pH of six or less is considered acidic.
Reprinted courtesy of Bob Welker, Construction Executive, a publication of Associated Builders and Contractors. All rights reserved.