# Service & Repair > Commercial Plumbing Service and Repair; St. Louis, St. Charles and Jefferson County; Diagnose On Site. Canonical: https://legacyplumbingmo.com/services/service-repair Last updated: 2026-10-29 Commercial Service Legacy Plumbing keeps commercial buildings across the St. Louis metro running with repair, drain and maintenance work handled by licensed service technicians. We schedule service 7am–4pm Mon–Fri and show up with the truck stocked for the call. Contact Us [636-978-0120](tel:+16369780120) ## Schedule Service Tell us about your project — we respond within one business day. Scheduled Break/Fix Repair ## Commercial service Monday–Friday, 7am–4pm. We provide commercial plumbing repair for leaks, backups, no hot water, failed fixtures, and gas issues. We send licensed technicians with stocked trucks so we can diagnose the problem and fix it on the first visit when possible. We keep you updated and give you clear documentation at every step. [Request Service](https://legacyplumbingmo.com/request-service) ### Services - Water heaters and boilers - Leak detection - Water line repair - Fixture and flush valve repair - Gas line service - Pumps, sump and ejector systems Who We Serve ## Buildings We Service - Industrial and manufacturing plants - Medical and dental offices - Office buildings and multi-tenant properties - Schools, churches and municipal buildings - Warehouses and distribution centers - Retail centers and restaurants under management contracts ### Explore More - [Medical Gas](https://legacyplumbingmo.com/services/medical-gas) - [Tenant Build-Out](https://legacyplumbingmo.com/commercial/tenant-finish) - [Plumbing in St. Peters, MO](https://legacyplumbingmo.com/locations/st-peters) - [All Commercial Services](https://legacyplumbingmo.com/commercial) Our Process ## How a Service Call Works ### Call or Submit Online Tell us the building, the symptom and the access requirements. We confirm a window same day where the schedule allows. ### Diagnose On Site The tech isolates the actual failure — camera, meter or pressure test — instead of guessing at parts. ### Repair or Quote Small repairs are handled on the spot. Larger scopes get a written quote before anyone spends your money. ### Report & Follow-Up You get documentation of what failed, what was replaced and what should be watched next. ## Why Choose Legacy for Service & Repair Why Facility Managers Keep Our Number ### Scheduled service 7am–4pm Mon–Fri We do not pretend to have a night crew. We do get you on the board fast during service hours. ### Licensed commercial service techs Master-licensed supervision on commercial systems, not residential techs learning on your building. ### History on your building Recurring customers get documented service history so the next tech is not starting from zero. ### Backed by a construction division When a repair turns into a replacement, the same company can price and build it. FAQ ## Commercial Plumbing Repair FAQs - **What commercial plumbing repair do you handle?:** Repair, drain and maintenance work for office buildings, medical and dental offices, schools, warehouses, industrial plants, retail centers and restaurants under management contracts, handled by licensed commercial service technicians. - **Should we repair or replace a failing system?:** The tech isolates the actual failure first. Small repairs are handled on the spot; larger scopes get a written quote, and our construction division can price and build a replacement. - **How do we schedule a service call?:** Call 636-978-0120 or submit a request online. Service is scheduled Monday–Friday, 7am–4pm; we do not staff an overnight crew. ## Request a Service & Repair Bid Send scope, schedule and site address. We reply within one business day. ## Schedule Service Tell us about your project — we respond within one business day. ## Related reading - [How to Choose a Commercial Plumbing Company in St. Louis](https://legacyplumbingmo.com/resources/how-to-choose-a-commercial-plumbing-company-st-louis) 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 - [Commercial Water Heater Repair & Replacement](https://legacyplumbingmo.com/facility-services/commercial-water-heaters) - [Plumbing Service for Facility Managers](https://legacyplumbingmo.com/facility-managers) - [Multifamily & Property Management Plumbing](https://legacyplumbingmo.com/industries/multifamily) - [Commercial Hydro Jetting for Recurring Backups](https://legacyplumbingmo.com/facility-services/hydro-jetting) - [Commercial Plumbing Contractors in St. Louis](https://legacyplumbingmo.com/commercial-plumbing-services) ### 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) ## Where we work ### St. Charles County - [Commercial plumbing in St. Charles County](https://legacyplumbingmo.com/locations/st-charles-county) - [Commercial plumbing in O'Fallon](https://legacyplumbingmo.com/locations/ofallon) - [Commercial plumbing in St. Peters](https://legacyplumbingmo.com/locations/st-peters) - [Commercial plumbing in St. Charles](https://legacyplumbingmo.com/locations/st-charles) - [Commercial plumbing in Wentzville](https://legacyplumbingmo.com/locations/wentzville) - [Commercial plumbing in Lake Saint Louis](https://legacyplumbingmo.com/service-area/lake-st-louis-mo) - [Commercial plumbing in Dardenne Prairie](https://legacyplumbingmo.com/service-area/dardenne-prairie-mo) - [Commercial plumbing in Cottleville](https://legacyplumbingmo.com/service-area/cottleville-mo) ### Lincoln County - [Commercial plumbing in Troy](https://legacyplumbingmo.com/service-area/troy-mo) - [Commercial plumbing in Moscow Mills](https://legacyplumbingmo.com/service-area/moscow-mills-mo) - [Commercial plumbing in Elsberry](https://legacyplumbingmo.com/service-area/elsberry-mo) ### Warren County - [Commercial plumbing in Warrenton](https://legacyplumbingmo.com/service-area/warrenton-mo) - [Commercial plumbing in Wright City](https://legacyplumbingmo.com/service-area/wright-city-mo) - [Commercial plumbing in Marthasville](https://legacyplumbingmo.com/service-area/marthasville-mo) ### St. Louis County - [Commercial plumbing in Chesterfield](https://legacyplumbingmo.com/locations/chesterfield) - [Commercial plumbing in Clayton](https://legacyplumbingmo.com/locations/clayton) - [Commercial plumbing in Affton](https://legacyplumbingmo.com/service-area/affton-mo) - [Commercial plumbing in Ladue](https://legacyplumbingmo.com/service-area/ladue-mo) - [Commercial plumbing in Brentwood](https://legacyplumbingmo.com/service-area/brentwood-mo) ### Jefferson County - [Commercial plumbing in Jefferson County](https://legacyplumbingmo.com/locations/jefferson-county) - [Commercial plumbing in Arnold](https://legacyplumbingmo.com/service-area/arnold-mo) - [Commercial plumbing in Festus](https://legacyplumbingmo.com/service-area/festus-mo) - [Commercial plumbing in Crystal City](https://legacyplumbingmo.com/service-area/crystal-city-mo) ### St. Louis City - [Commercial plumbing in St. Louis](https://legacyplumbingmo.com/locations/st-louis) - [Commercial plumbing in Central West End](https://legacyplumbingmo.com/service-area/central-west-end-mo) - [Commercial plumbing in Compton Heights](https://legacyplumbingmo.com/service-area/compton-heights-mo) - [Commercial plumbing in Lafayette Square](https://legacyplumbingmo.com/service-area/lafayette-square-mo) [All commercial plumbing service areas by county](https://legacyplumbingmo.com/service-areas) ## Need a Plumber in St. Louis or the Surrounding Area? Written bids within one business day, scheduled service Monday–Friday 7am–4pm, and union-trained crews since 1996 across the St. Louis metro and a 2-hour radius. [Get Free Estimate](https://legacyplumbingmo.com/contact-us) [636-978-0120](tel:+16369780120) ## From Our Job Sites Legacy Plumbing service vans ## 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)