The water company aims to appoint six contractors for the 4-year deal, which will see best performing firms singled out for more work packages as time passes and framework extensions of a further four and two years come into play.
Contractors will also be responsible for civil engineering works, including excavations, chamber construction, pipe installation, testing and chorination.
Firms have until Guy Fawkes night to complete PQQs and must email [email protected] for further details.