# Medical Gas Piping Contractor St. Louis > ASSE 6010-certified med gas installers for surgery centers, clinics and dental offices in St. Louis. NFPA 99 installs with ASSE 6030 verification. Canonical: https://legacyplumbingmo.com/services/medical-gas Last updated: 2026-10-28 NFPA 99 Med Gas Legacy Plumbing installs and repairs medical gas systems for healthcare facilities across the St. Louis metro. Our brazers are certified to ASSE 6010 and every system is installed, purged and documented to NFPA 99 before a third-party verifier walks the job. Contact Us [636-978-0120](tel:+16369780120) ## Request Med Gas Pricing Tell us about your project — we respond within one business day. Who We Serve ## Facilities We Pipe - Hospitals and hospital renovations - Ambulatory surgical centers - Dental offices and oral surgery suites - Veterinary clinics and animal hospitals - Outpatient imaging and infusion centers - Laboratories and research facilities ### Explore More - [Service & Repair](https://legacyplumbingmo.com/services/service-repair) - [Tenant Build-Out](https://legacyplumbingmo.com/commercial/tenant-finish) - [Plumbing in Chesterfield, MO](https://legacyplumbingmo.com/locations/chesterfield) - [All Commercial Services](https://legacyplumbingmo.com/commercial) Systems ## Medical Gas Systems We Install NFPA 99 covers each of these systems. We pipe what the facility's program calls for. ### Oxygen Oxygen piping, zone valves and outlets for patient care areas. ### Medical Air Medical air distribution from the source equipment to each outlet. ### Medical Vacuum Vacuum piping and inlets for surgical and treatment rooms. ### Nitrous Oxide Nitrous oxide piping for surgical and dental use. ### Nitrogen Nitrogen piping for instrument and equipment use. ### Dental Air & Vacuum Dental air and vacuum piping for operatories in dental and oral surgery suites. Our Process ## How Med Gas Work Is Delivered ### Scope & Zone Review We review outlet counts, zone valves and alarm requirements against the plans and the facility's existing system. ### Certified Brazing ASSE 6010 brazers install copper med gas tube under nitrogen purge, with joints logged as they go. ### Pressure & Purity Testing Initial pressure, cross-connection and purity testing performed before concealment. ### Third-Party Verification We coordinate the ASSE 6030 verifier and stay on site to close any item they raise. ### Documentation Turnover Test records, brazer certifications and as-builts handed to the facility for its accreditation file. ## Why Choose Legacy for Medical Gas Certified Med Gas Plumbers for St. Louis Healthcare Facilities ### ASSE 6010 certified installers Med gas is not a side scope for us — it is piped by certified brazers who do it regularly. ### Infection-control aware crews We work inside operating facilities with ICRA containment and after-hours scheduling when the department requires it. ### Documentation that survives an audit Every test and certification is packaged so your compliance team is not chasing paperwork later. ### Metro-wide coverage Crews dispatched to St. Louis City, St. Louis County, St. Charles County and Jefferson County facilities. Project Proof ## Recent Work Healthcare / Dental ### Dental Medical Gas in South St. Louis County St. Louis, South St. Louis County New dental office sanitary, water, air, vacuum, oxygen and nitrous oxide piping, with underground work and hot-water recirculation. View project scope Healthcare / Dental ### Dental Practice Expansion in Wentzville Wentzville, St. Charles County Five new treatment rooms with dental gas, air and vacuum, a sterilization area, ADA restroom rework and concrete floor patching. View project scope Healthcare / Dental ### Dental Office Plumbing in Hazelwood Hazelwood, MO Dental office rough-in, medical gas, dental vacuum, sterilization and lab plumbing. View project scope Healthcare / Dental ### Dental Office Plumbing in St. Louis St. Louis Metro Ground-up dental office plumbing, underground utilities, medical gas and dental vacuum. View project scope Commercial ### Medical Office Rough-In St. Charles County, MO Copper domestic water and PEX distribution; Sanitary and vent rough-in for exam and lab rooms View project scope [View all projects](https://legacyplumbingmo.com/projects) FAQ ## Medical Gas Piping — FAQs - **Are your med gas plumbers certified?:** Yes. Legacy Plumbing's medical gas piping is brazed by ASSE 6010 certified installers to NFPA 99, and each finished system is checked by an independent ASSE 6030 verifier before use. - **What certification do med gas installers need?:** Installers who braze medical gas piping are certified to ASSE 6010, and the finished system is checked by an independent ASSE 6030 verifier. The installation follows NFPA 99. - **Do dental offices need med gas verification?:** If the practice pipes nitrous oxide or oxygen, that piping is a medical gas system under NFPA 99 and is verified by a third-party ASSE 6030 verifier before use. - **Who can install medical gas piping in St. Louis?:** Medical gas piping should be installed by brazers certified to ASSE 6010 working to NFPA 99, with the finished system checked by an independent ASSE 6030 verifier. Legacy Plumbing's certified brazers install copper med gas tube under nitrogen purge and log joints as they go. - **What medical gas systems does Legacy Plumbing install?:** We pipe oxygen, medical air, medical vacuum, nitrous oxide and nitrogen, plus dental air and vacuum for operatories. The work includes zone valves, outlets, inlets and alarm requirements reviewed against the plans and the facility's existing system before installation starts. - **How is a new medical gas system tested before use?:** Initial pressure, cross-connection and purity testing are performed before the piping is concealed. We then coordinate the third-party ASSE 6030 verifier and stay on site to close any item they raise, so the system is verified before it serves patients. - **Can you work on medical gas in an occupied hospital or clinic?:** Yes. Our crews work inside operating facilities with ICRA containment and after-hours scheduling when the department requires it. Test records, brazer certifications and as-builts are handed to the facility for its accreditation file when the work is complete, so compliance teams aren't chasing paperwork. ## Request a Medical Gas Bid Send scope, schedule and site address. We reply within one business day. ## Request Med Gas Pricing Tell us about your project — we respond within one business day. For examples of this work, see [12-Chair Dental Plumbing in Lake Saint Louis (Lake Saint Louis, St. Charles County)](https://legacyplumbingmo.com/projects/dental-office-12-chair-lake-st-louis-mo) . For planning guidance, read [Dental Office Plumbing: Operatories, Vacuum and Air, Sterilization and Rough-In](https://legacyplumbingmo.com/resources/dental-office-plumbing-rough-in-guide) and [Medical Gas Plumbing Compliance: What Facility Owners Need to Know](https://legacyplumbingmo.com/resources/medical-gas-plumbing-compliance-facility-owners) . ### Related Services - [Healthcare Plumbing](https://legacyplumbingmo.com/industries/healthcare) - [Dental Office Plumbing](https://legacyplumbingmo.com/industries/dental-office-plumbing) - [Tenant Finish & Build-Out](https://legacyplumbingmo.com/commercial/tenant-finish) - [Our Projects](https://legacyplumbingmo.com/projects) ### 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) ## 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)