The restrooms on the third floor run weak by mid-morning. Maintenance has patched the same copper loop four times this year. A restaurant’s hand sink drips rust after every weekend closure. For commercial repiping, Dallas business owners need the pipe replaced without closing the doors to do it. Fullbore Dallas Repiping replaces water supply lines in Dallas homes and business buildings, from a single restroom group to a full building.
We work in offices, retail, restaurants, clinics and mixed-use buildings. The pipe work looks like a house repipe at a bigger scale. What makes it commercial is the planning around it: your operating hours, the shutdown windows, access to occupied suites and who approves each step. The scope is the drinking water system up to fixtures and equipment connections. Fire sprinklers, process water, gas, drains and the backflow preventer at the service are separate trades.
What we check on the first visit
We map the water system before we map the problem. We find where the service enters, where the backflow preventer and any pressure-reducing valve sit, where the water heaters are, and whether a recirculation loop serves the far restrooms. Then we look for isolation valves, because they decide how the building can be phased. Older buildings sometimes have few valves, or valves that no longer close.
We also learn how you use the building. You or your property manager set the operating hours, the fixtures that cannot be off long, the access and security rules, and who can approve entry to each suite. Leak and repair records show where the old system is failing, and we compare any drawings with what we see above the ceiling.
What is driving the repipe?
The reason shapes the boundary. Galvanized steel mains in an older building narrow from the inside until the upper floors or far restrooms run weak. Copper can pinhole along a hot line or a pumped recirculation loop. Aged CPVC turns brittle and cracks when someone touches it during unrelated work. Each points to a different extent, and our guide to recurring pinhole leaks explains why one leak rarely sets the scope by itself.
Can you stay open during the work?
Usually, yes. We build new mains and branches while the old system stays live, so most of the work happens with the water on. The shutdowns come at cutover, when a zone switches from old pipe to new, and we set those windows with you: before opening, after close or on a weekend.
Our first phase often adds the valves the building lacks, so each later phase isolates one floor or wing instead of the whole property. In a restaurant, the hand and prep sinks, the dish area and the water heater set the limits on any outage. In an office or clinic, the restrooms and any clinical sinks do. Notice to occupants goes out from you or your manager, and the water shutoff guide covers how to plan them.
Where a fixture group cannot be off at all during business hours, a temporary connection can sometimes keep it fed while the rest of the zone is cut over. We pressure test and flush each phase before it goes live, then check hot water temperature at the far fixtures once the recirculation loop is back. A loop with balancing valves may need resetting, since new pipe changes how water divides between branches.
Approvals need the same care. Your written scope names who can authorize a change, how added work is priced before it starts and who signs off on each phase. Permission to enter a suite is not approval to change its piping, so we keep those two lists separate.
Copper, PEX or CPVC?
Type L copper is a long-standing choice for commercial mains, and press-connect fittings join it without an open flame, which matters above occupied suites and stored goods. PEX and CPVC are also allowed when listed and installed to the 2021 International Plumbing Code with Dallas amendments; the PEX vs copper guide and our copper repiping page compare them. Larger buildings often add the owner’s own standards on top.
Pipe passing through a fire-rated wall or floor needs a listed firestop system matched to the pipe and the assembly. That work is easy to miss when several trades share a ceiling, so our estimate says who installs and documents it. If the building has vertical stacks serving several floors, see plumbing riser replacement.
Is a repipe coming in an occupied building?
Tell us the building type, the affected zones, your operating hours and the access rules, and we will price a phased scope.
Permits and inspection, phase by phase
Commercial repiping is permitted plumbing work in Dallas. We submit the permit through DallasNow, and since June 1, 2026 the City has coordinated plumbing rough and final inspections. On a phased job, each phase gets its rough inspection while the ceiling or wall is still open, so the schedule leaves room for it before restoration starts.
Slips cost real money. The City’s fee schedule lists $200 per trade for unauthorized concealment and $75 for a reinspection. The Dallas repiping permit guide covers the steps, and the City of Dallas Building Inspection office sets what a given commercial scope needs to submit.
Will you have to open ceilings and walls?
Yes. Above a lay-in ceiling grid, that mostly means lifting tiles and protecting what sits below. Hard ceilings, kitchen walls, tiled restrooms and finished corridors each need openings that someone has to close, and in a commercial building that someone may be a separate trade. Our estimate lists every opening and names who restores it: tile reset, drywall, texture, paint or specialty finishes.
Protection is part of the scope too. Floor coverings in work paths, dust barriers in occupied areas, after-hours cleanup and secure storage for tools and materials should all be written down. The repiping process and timeline guide explains how a phased job runs day to day.
How we price a commercial repipe
We price each building after the first visit, because buildings differ far more than houses do. The main pieces are the number of fixtures and floors, pipe sizes and route length, the material, how many zones the building is split into and how many valves it needs. Access above hard ceilings, through rated assemblies or inside occupied suites adds labor.
After-hours shutdowns where agreed, protection of occupied areas, firestopping, the permit and phased inspections, and restoration all move the number, and your written estimate lists each. The repiping cost estimator lists the drivers, and the Dallas repiping cost guide explains why two commercial quotes rarely cover the same boundary.
Before you decide
Before comparing bids, our guide to repiping quotes and warranties shows what each should list about zones, retained pipe and restoration. Residential buildings with units and an association are covered on apartment and condo repiping, and the Dallas home repiping guide explains materials and methods that apply in both settings.
