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Valdez PlumbingDowntown LA, answering 24/7 Answered 24/7(818) 806-6494

Commercial plumbing in Los Angeles for shops, offices, restaurants and warehouses

The restroom is out of order, a floor drain is backing up in the back of house, or the water heater quit before the morning rush. Commercial plumbing problems cost you hours you cannot get back.

  • Answered 24/7
  • From 746 S Broadway
  • Fixtures, remodels & property
Remodeled Los Angeles bathroom with a new wall hung toilet, matte black faucet and white subway tile, plumber checking the supply valve

The short answer

Commercial plumbing is repair, replacement and maintenance on the systems in businesses: restrooms with flushometer valves, floor drains and floor sinks, commercial water heaters, gas lines to equipment, backflow assemblies and the building sewer. You need it when a fixture fails during business hours, when a tenant improvement changes the layout, or when a city or water department requires testing.

Restrooms that hold up to public use

Commercial restrooms take far more use than a home bathroom. Flushometer valves on toilets and urinals need rebuild kits every few years, and hard water speeds that up. Sensor faucets and flush valves fail at the solenoid or battery, and wall-hung fixtures rely on carriers inside the wall that loosen when someone leans on a sink.

We carry common flushometer kits and replacement parts for the brands found in most Los Angeles businesses, so many restroom calls are fixed on the first visit. When a fixture keeps clogging, we look at the branch drain, since commercial restrooms often share one horizontal line that collects paper and debris. For a single failing bowl in a smaller office, our toilet repair notes apply too.

  • Flushometer diaphragm and piston rebuilds
  • Sensor faucet and flush valve repair
  • Wall-hung toilet and sink carrier tightening
  • Accessible fixture height and grab bar clearance
  • Restroom branch drain clearing

Floor drains, floor sinks and the building sewer

Restaurants, salons, gyms and warehouses depend on floor drains. Food solids, hair, lint and sediment settle in floor sinks and their traps. If a trap primer fails, the trap dries out and sewer gas reaches the space. We clean floor drains, replace grates and primers, and clear the branch lines they feed.

Most commercial backups trace to the building drain or the lateral to the street. We clear it from the main cleanout, then run a camera through the line to see grease buildup, roots or broken pipe. In food service, grease lines connect to the interceptor, covered on our grease trap page.

Plumber servicing a commercial restroom with multiple sinks in a Los Angeles office building

Commercial water heaters and gas for equipment

Commercial water heaters run harder than home units and scale faster in hard water. Restaurants and laundromats often need high-recovery tanks or banks of tankless heaters, plus booster heaters at dishwashers. Undersized or scaled heaters are the main reason hot water runs out during peak hours.

We flush and descale heaters on a schedule, replace anodes and relief valves, and size replacements to your actual demand. Gas work for ranges, fryers, dryers and rooftop units includes piping, flex connectors, shutoffs and a pressure test. If you are adding equipment, our gas line installation page covers sizing and permits.

Every tank still needs seismic strapping, and every gas appliance needs a reachable shutoff. Those are the first things inspectors check after a tenant improvement.

Tenant improvements and working around business hours

When a space changes hands, the plumbing layout usually changes too: new restrooms, a break room sink, a mop sink, or a full kitchen. We rough in drains, vents, water and gas to match the plans, then coordinate inspections with the general contractor or property owner.

Many businesses cannot shut down for plumbing. We schedule shutdowns and noisy work before opening, after closing or on weekends, and we keep water off for as short a time as possible. Because we answer 24/7, an overnight backup or burst line gets a response before customers arrive. If the space also has a backflow assembly on its water service, we can test it during the same visit through our annual backflow test work, which saves a second shutdown. We cover storefronts and offices from downtown out to Long Beach and the Valley.

Close up of a commercial flush valve on a wall mounted toilet being adjusted

Warning signs

Commercial plumbing problems to catch early

  • Flushometer running nonstopA commercial toilet or urinal valve that will not shut off wastes water and floods the bowl. The diaphragm or piston kit has usually failed.
  • Floor drains smelling of sewerDry traps let sewer gas into the space. Trap primers fail, and seldom-used floor drains in storage rooms dry out first.
  • Hot water running out middayWhen a commercial heater cannot keep up, the tank is scaled, a burner is failing or demand has grown past its size.
  • Slow drains in a row of sinksSeveral slow fixtures on one side of the building point to the branch or building drain, not individual traps.
  • Water in the parking lot or alleyWet pavement in dry weather can be a service line leak, a backflow relief valve discharging, or an irrigation break.
  • Backflow test notice from the cityMissing the annual test deadline can lead to fines or water shutoff. Schedule it before the notice date.

Typical pricing

Typical commercial plumbing costs in Los Angeles

Commercial pricing depends on access, after-hours scheduling, fixture type and whether permits or inspections are involved.

JobTypical LA range
Flushometer valve rebuild on a toilet or urinal$175 to $400
Clear a building drain from the main cleanout$350 to $1,100
Replace a floor drain trap primer$300 to $800
Replace a commercial gas water heater$4,500 to $12,000
Restroom rough-in for a tenant improvement$6,000 to $18,000

These are typical ranges, not a quote, and after-hours work, roof or ceiling access, and permit fees can change the cost. See every job in our LA price guide.

On the job

How a commercial plumbing job runs with us

  1. STEP1

    Talk through the impact

    We ask what is down, what hours you operate and where cleanouts, mechanical rooms and shutoffs are.

  2. STEP2

    Pick the right time

    Emergency work starts right away. Planned work is set before or after business hours when possible.

  3. STEP3

    Diagnose and repair

    We find the cause with tests and camera where needed, then repair with commercial grade parts.

  4. STEP4

    Test and document

    Fixtures, drains and heaters are run under load, and gas work is pressure tested.

  5. STEP5

    Set up maintenance

    If repeat problems are likely, we suggest a schedule for jetting, flushing or valve rebuilds.

Commercial plumbing in Los Angeles buildings

Commercial stock across Los Angeles runs from prewar brick storefronts downtown with cast iron drains to strip centers along the Valley boulevards and tilt-up warehouses near the harbor and the 5 and 710 corridors. Older buildings often have galvanized supply and clay or cast iron laterals. Hard water wears out flushometer valves and heaters quickly. Parking and loading are tight on many commercial streets, so we plan access ahead. Backflow assemblies on LADWP service need annual testing by a certified tester, and permit work in the City of Los Angeles goes through LADBS.

Questions we hear

Commercial Plumbing questions from LA customers

Can commercial plumbing repairs be done outside business hours?

Yes. Planned work like heater replacement, drain jetting and valve rebuilds can be scheduled before you open, after you close or on weekends. Emergencies are handled whenever they happen, since we answer around the clock, including nights and holidays. Tell us your opening time so we plan around it.

Why do commercial plumbing flush valves fail so often in Los Angeles?

Heavy use and hard water. Mineral scale wears the diaphragm or piston and blocks the small bypass hole that controls flush volume. A rebuild kit usually fixes it. In busy restrooms, plan on rebuilds every few years rather than waiting for a valve to run nonstop.

Do you handle commercial backflow testing and repair?

Yes. We test backflow assemblies on domestic, fire and irrigation lines, file the results with the water department and repair or replace assemblies that fail. LADWP and most local water departments require testing every year, so we note your due date and remind you to plan the next visit.

What commercial plumbing work needs a permit for a tenant improvement?

New or moved restrooms, sinks, floor drains, water heaters and gas lines generally need a permit and inspection. In the City of Los Angeles that goes through LADBS, while cities like Burbank, Glendale and Santa Monica run their own departments. We coordinate the plumbing inspections with your contractor.

Often booked together

Related plumbing work

Fixtures, remodels & property

Grease Trap Service

Pumping, cleaning and repair of under-sink grease traps and in-ground interceptors, plus jetting of the kitchen lines that feed them.

See the details
Pipes, gas & water lines

Backflow Testing

Annual backflow assembly testing for homes, apartments and businesses, with repairs to failed checks and results filed with LADWP or your city water department.

See the details
Drains & sewer

Hydro Jetting

High-pressure water jetting that scours grease, scale, sludge and fine roots off the pipe wall, for lines that keep clogging after a cable has gone through.

See the details
Fixtures, remodels & property

Apartment Building Plumbing

Drain stacks, central water heaters and boilers, riser valves, unit leaks and backflow testing for apartment buildings and small complexes in LA.

See the details

Need commercial plumbing today?

Call the line any hour. A plumber answers, asks what you are seeing and tells you what happens next.

Call (818) 806-6494
Call (818) 806-6494