Multifamily Plumbing in St. Louis
Apartment and mixed-use buildings repeat the same plumbing layout floor after floor. We run crews that keep stacked risers, unit rough-in and trim consistent, and we support owners with service once residents move in.
Common Plumbing Needs
- Stacked waste, vent and water risers
- Unit rough-in and fixture trim
- Central water heating and recirculation
- Domestic water booster systems
- Ongoing service for property owners
Planning Plumbing for Multifamily
Multifamily plumbing requires repeatable unit rough-in, stacked sanitary and vent piping, domestic water distribution and fixture trim. Legacy Plumbing supports apartment and mixed-use construction as well as ongoing service for property owners. The sequence matters: underground utilities come before the slab, risers and stacks establish the layout, and unit-by-unit rough-in coordinates with the general contractor and follow-on trades. Central water heating, recirculation and booster systems also need to be considered alongside the building's actual demand.
Services for Your Building
New Construction
Legacy Plumbing has installed commercial plumbing systems for new-build projects across the St. Louis metro since 1996. Our master-licensed team handles everything from underground rough-in through final fixture trim-out, on schedule and on budget.
Service & Repair
Legacy Plumbing handles commercial plumbing repairs, drains and maintenance across the St. Louis metro with union plumbers. For an active leak, sewage backup or loss of essential hot water, protect people first and call with the affected system and shutoff status. The office must confirm scheduling.
Building Rehab & Repiping
Replacing galvanized and failing copper risers and branches with new copper or press-fit systems. Removing corroded cast iron waste and vent stacks and reinstalling to current code with proper cleanouts.
Commercial Water Heaters
Gas and electric commercial tanks, storage tanks, and multi-unit banks sized to peak demand. Rack-mounted condensing tankless installs with cascade controls, proper venting, and condensate neutralization.
Code, Compliance & Maintenance
Domestic water service, backflow protection and metering are part of the multifamily rough-in scope documented in our project history. Backflow assemblies require annual testing and reporting to the water authority. In existing buildings, repiping can replace failing domestic water risers and corroded waste and vent stacks, with testing and inspection floor by floor. Renovation planning also considers backflow protection, mixing valves, venting and accessibility when walls are open. Scheduled shutdown windows and tenant notification belong in the repiping plan, not as an afterthought during installation.
Relevant Legacy Projects
What to Send for a Bid
Send drawings or a written scope, your target schedule and the project jurisdiction through our project bid form. Legacy Plumbing returns written bids within one business day. Our UA Local 562 crews have served the St. Louis metro since 1996. View our service areas for coverage.
For repairs and maintenance, request scheduled service or call 636-978-0120. Scheduled service Monday–Friday, 7am–4pm. 24/7 emergency calls answered. Nights and weekends are billed at higher rates.
Multifamily Plumbing FAQ
Do you handle multi-story apartment plumbing rough-in?
Yes. Our Multi-Family Rough-In project in the St. Louis metro included site sanitary, storm and domestic water, multi-story sanitary and vent stacks, unit-by-unit rough-in, backflow and metering, self-performed from excavation through top-out.
Can you plan repiping around occupied units?
Our building rehab and repiping service uses floor-by-floor or stack-by-stack sequencing, scheduled shutdown windows and tenant notification. The scope includes domestic water risers and branches, waste and vent replacement, testing and inspections.
Do you handle property management plumbing for apartment buildings?
Yes. As a multifamily plumbing contractor we build new apartment and mixed-use projects and provide ongoing service for property owners and managers, including repairs, commercial water heaters, backflow testing and repiping.
How do owners or contractors request a multifamily bid?
Use our Contact page to send drawings or a written scope, the jurisdiction and target schedule. Written bids are returned within one business day. Property service is scheduled Monday–Friday, 7am–4pm (24/7 emergency calls answered; nights and weekends are billed at higher rates); call 636-978-0120.
Need a Plumber in St. Louis or the Surrounding Area?
Written bids within one business day, scheduled service Monday–Friday 7am–4pm (24/7 emergency calls answered; nights and weekends are billed at higher rates), and union-trained crews since 1996 across the St. Louis metro and a 2-hour radius.
From Our Job Sites
