# Water Main Repair > Commercial Water Main Repair and Replacement; St. Louis metro; Scheduled Leak Repair, Full Main Replacement. Canonical: https://legacyplumbingmo.com/facility-services/water-main-repair Facility Services A failed water main takes a building offline. Legacy Plumbing self-performs excavation, so we locate, expose, repair, and restore commercial water mains across St. Louis without waiting on a separate digging contractor. [Schedule a Water Main Repair](https://legacyplumbingmo.com/contact-us) [636-978-0120](tel:+16369780120) ## Request Water Main Service Tell us about your project — we respond within one business day. What's Included ## Water Main Work We Self-Perform Our own excavators, locators, and pipe crews handle the whole repair from locate through final restoration. ### Scheduled Leak Repair Locate, expose, and repair breaks in domestic and fire service mains with service scheduled Mon–Fri 7am–4pm. ### Full Main Replacement Replacing failed ductile iron, cast iron, galvanized, and poly mains with new DIP or HDPE sized to demand. ### Service Line & Tap Work New taps, curb stops, meter pits, and service line upsizing coordinated with Missouri American Water and city districts. ### Fire Line & Vault Work Fire service mains, post indicator valves, and backflow vaults installed to fire-marshal requirements. ### Leak Detection & Locating Acoustic leak detection and utility locating so we dig once instead of chasing water across the site. ### Restoration Backfill, compaction, concrete, asphalt, and seed so the site looks finished when the crew leaves. Our Process ## How a Main Repair Runs ### Locate & Assess Utility locates, leak detection, and a shutdown plan built with the water district before the first shovel. ### Expose & Repair Careful excavation around existing utilities, then the repair or replacement with approved fittings and bedding. ### Test & Disinfect Pressure test, chlorination, and bacteriological sampling where the district requires it before the main returns to service. ### Backfill & Restore Compacted backfill, surface restoration, and as-builts for your facility records. ## Water Main Repair FAQ ### How fast can you get to a main break? We schedule service from 7am–4pm Mon–Fri across the St. Louis metro and prioritize main breaks that have a building offline. ### Do you handle the excavation yourselves? Yes. We own our excavators, locators, and pipe crews, so the same company that digs the trench installs and tests the main. ### Will you coordinate with the water district? Yes. We handle shutdown scheduling, taps, and required testing with Missouri American Water and the municipal districts across the metro. For examples of this work, see [Facility Water Heater & Backflow Program (Regional Portfolio)](https://legacyplumbingmo.com/projects/facility-water-heater-backflow-program) and [Plant Cafeteria Plumbing in St. Louis (St. Louis, City of St. Louis)](https://legacyplumbingmo.com/projects/pharmaceutical-plant-cafeteria-renovation-st-louis) . For planning guidance, read [When a Commercial Plumbing Problem Can't Wait](https://legacyplumbingmo.com/resources/commercial-plumbing-emergency-what-to-do-first) and [Before the First Hard Freeze: A Plumbing Walk-Through for St. Louis Commercial Buildings](https://legacyplumbingmo.com/resources/first-hard-freeze-commercial-plumbing-walkthrough-st-louis) . ### Related Services - [Underground & Site Utilities](https://legacyplumbingmo.com/commercial/underground-site-utilities) - [Backflow Install & Testing](https://legacyplumbingmo.com/commercial/backflow-prevention) - [All Facility Services](https://legacyplumbingmo.com/residential) ### Next Steps - [Request Service](https://legacyplumbingmo.com/request-service) - [View All Commercial Services](https://legacyplumbingmo.com/commercial) - [Request a Free Estimate](https://legacyplumbingmo.com/contact-us) Serving the Greater St. Louis Area ## Water Main Repair Across the St. Louis Metro Aging water infrastructure is a constant across Greater St. Louis — brittle cast iron under South City and Soulard, shifting clay in Florissant and Hazelwood, and rock shelf out in Wentzville and Lake Saint Louis all break mains for different reasons. Because we self-perform underground work, we don't wait on a sub to dig — your domestic and fire service go back in with the same crew that runs the building's plumbing. Don't see your city below? We work the entire metro and a 2-hour radius from O'Fallon, MO. [View full service area →](https://legacyplumbingmo.com/service-areas) ### St. Charles County - [O'Fallon](https://legacyplumbingmo.com/locations/ofallon) - [St. Charles](https://legacyplumbingmo.com/locations/st-charles) - [St. Peters](https://legacyplumbingmo.com/locations/st-peters) - [Wentzville](https://legacyplumbingmo.com/locations/wentzville) - [Lake Saint Louis](https://legacyplumbingmo.com/service-area/lake-st-louis-mo) - [Dardenne Prairie](https://legacyplumbingmo.com/service-area/dardenne-prairie-mo) - [Cottleville](https://legacyplumbingmo.com/service-area/cottleville-mo) - [Weldon Spring](https://legacyplumbingmo.com/service-area/weldon-spring-mo) - [New Melle](https://legacyplumbingmo.com/service-area/new-melle-mo) - [Foristell](https://legacyplumbingmo.com/service-area/foristell-mo) ### Lincoln County - [Troy](https://legacyplumbingmo.com/service-area/troy-mo) - [Moscow Mills](https://legacyplumbingmo.com/service-area/moscow-mills-mo) - [Elsberry](https://legacyplumbingmo.com/service-area/elsberry-mo) - [Winfield](https://legacyplumbingmo.com/service-area/winfield-mo) - [Old Monroe](https://legacyplumbingmo.com/service-area/old-monroe-mo) - [Hawk Point](https://legacyplumbingmo.com/service-area/hawk-point-mo) - [Silex](https://legacyplumbingmo.com/service-area/silex-mo) ### Warren County - [Warrenton](https://legacyplumbingmo.com/service-area/warrenton-mo) - [Wright City](https://legacyplumbingmo.com/service-area/wright-city-mo) - [Marthasville](https://legacyplumbingmo.com/service-area/marthasville-mo) - [Innsbrook](https://legacyplumbingmo.com/service-area/innsbrook-mo) - [Truesdale](https://legacyplumbingmo.com/service-area/truesdale-mo) ### St. Louis County - [Affton](https://legacyplumbingmo.com/service-area/affton-mo) - [Clayton](https://legacyplumbingmo.com/locations/clayton) - [Ladue](https://legacyplumbingmo.com/service-area/ladue-mo) - [Brentwood](https://legacyplumbingmo.com/service-area/brentwood-mo) - [Chesterfield](https://legacyplumbingmo.com/locations/chesterfield) - [Crestwood](https://legacyplumbingmo.com/service-area/crestwood-mo) - [Des Peres](https://legacyplumbingmo.com/service-area/des-peres-mo) - [Fenton](https://legacyplumbingmo.com/service-area/fenton-mo) - [Lemay](https://legacyplumbingmo.com/service-area/lemay-mo) - [Maplewood](https://legacyplumbingmo.com/service-area/maplewood-mo) ### Jefferson County - [Arnold](https://legacyplumbingmo.com/service-area/arnold-mo) - [Festus](https://legacyplumbingmo.com/service-area/festus-mo) - [Crystal City](https://legacyplumbingmo.com/service-area/crystal-city-mo) - [Herculaneum](https://legacyplumbingmo.com/service-area/herculaneum-mo) - [Pevely](https://legacyplumbingmo.com/service-area/pevely-mo) - [De Soto](https://legacyplumbingmo.com/service-area/de-soto-mo) - [Hillsboro](https://legacyplumbingmo.com/service-area/hillsboro-mo) - [Barnhart](https://legacyplumbingmo.com/service-area/barnhart-mo) - [Imperial](https://legacyplumbingmo.com/service-area/imperial-mo) - [High Ridge](https://legacyplumbingmo.com/service-area/high-ridge-mo) ### St. Louis City - [Central West End](https://legacyplumbingmo.com/service-area/central-west-end-mo) - [Compton Heights](https://legacyplumbingmo.com/service-area/compton-heights-mo) - [Lafayette Square](https://legacyplumbingmo.com/service-area/lafayette-square-mo) - [Soulard](https://legacyplumbingmo.com/service-area/soulard-mo) - [Tower Grove South](https://legacyplumbingmo.com/service-area/tower-grove-south-mo) - [Shaw](https://legacyplumbingmo.com/service-area/shaw-mo) - [Benton Park](https://legacyplumbingmo.com/service-area/benton-park-mo) - [The Hill](https://legacyplumbingmo.com/service-area/the-hill-mo) - [Dogtown](https://legacyplumbingmo.com/service-area/dogtown-mo) - [South City](https://legacyplumbingmo.com/service-area/south-city-st-louis-mo) ## Water Main Down at Your St. Louis Property? Call 636-978-0120 or send details and we'll get a crew scheduled. [Get Free Estimate](https://legacyplumbingmo.com/contact-us) [636-978-0120](tel:+16369780120) ## Related - [Contact Legacy Plumbing](https://legacyplumbingmo.com/contact-us) - [Company facts](https://legacyplumbingmo.com/company-facts) - [All pages (llms.txt)](https://legacyplumbingmo.com/llms.txt)