About 4km (2.5 miles) of sewers will be altered in Willenhall, Darlastan, Goscote, Streetly and Tividale.

A spokesman said there would be some disruption to traffic but it would be kept to a minimum as far as possible. The work will be finished by Christmas.

A Severn Trent spokesman said the work was necessary to prevent pipes collapsing, which could cause flooding.