Waiting for a complete sewer line failure is not only Denver’s municipality worst nightmare but also a homeowners. Clay sewer pipes were used during construction in the 1930s through 1950, there is a new way to test for cracks or corroded sewer-liner pipes is the smoke test. The problem that caught Denver city officials’ attention was on rainy days, the flow reached near 10 million gallons. It indicates that cracks and holes have allowed rainwater to rush into the sewer system. Denver, to learn more about smoke testing call Perma-Liner and for all your sewer-pipelining needs call toll free at 866-336-2568 or visit our website at www.perma-liner.com.