Plugging the Le­aks

A multilayered poly resin liner system enables a Michigan utility to conquer inflow and infiltration in manholes

High levels of hydrogen sulfide had corroded 1/2 to 1 inch of the concrete-brick and precast concrete manholes in Kalamazoo, Mich., causing infiltration as high as 20 gpm. The worst of four targeted offenders had leaks that squirted water like leaking garden hoses.


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