Commercial Plumbing in Ontario, CA
Trusted by restaurants, retail centers, hotels, offices & property managers across Ontario — from Ontario Mills to the airport corridor
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Commercial Plumbing Services in Ontario
Regal Plumbing & Rooter is headquartered at 2141 E Philadelphia St, Suite R right here in Ontario, CA — and we have provided commercial plumbing for the city’s restaurants, hotels, retail centers, and property managers for over 20 years. From the dining and lodging concentration around Ontario Mills and Ontario International Airport to the 4th Street restaurant corridor and the office parks near the Ontario Convention Center, we know the buildings, the tenants, and the water systems. CA License #1097482, fully insured, and 24/7. Call (909) 600-4561.
- ✓24/7 commercial emergency response in Ontario
- ✓Backflow testing & certification (IEUA paperwork filed)
- ✓Restaurant grease line maintenance & hydro jetting
- ✓Apartment & HOA preventive maintenance contracts
- ✓After-hours service to keep restaurants and retail open
- ✓Net-30 billing with detailed invoicing for accounting
- ✓CA License #1097482, fully insured (GL + workers' comp)
- ✓Established property management partnerships across Ontario
What We Cover
Services We Provide
Restaurants & Hotels
Grease trap service, drain jetting, and emergency plumbing for 4th Street restaurants, Ontario Mills food court tenants, and airport-corridor hotels.
Retail & Office Parks
Tenant improvement plumbing, ADA fixture installs, and preventive maintenance for Ontario Mills, Ontario Convention Center properties, and Philadelphia St office parks.
Apartments & HOAs
Re-pipes, water heater replacement, and ongoing maintenance contracts for multi-unit housing across Ontario’s residential cores.
Our Promise
Why Choose Regal?
Honest Pricing
Upfront, transparent quotes before any work begins. No hidden fees, no surprises — even in emergencies.
Fast Response
24/7 availability for emergencies. We arrive quickly and work efficiently to minimize damage.
Quality Workmanship
Every job backed by our commitment to premium craftsmanship and lasting results.
Explore
Other Services We Offer
Emergency Plumbing
Rapid-response emergency plumbing for Ontario, CA and surrounding cities - we’re on call around the clock.
Learn More →Drain Cleaning
Professional clearing of kitchen, bathroom, and main sewer line blockages.
Learn More →Sewer Line Repair
Camera inspection, trenchless repair, and full sewer line replacement.
Learn More →Water Heater Services
Installation and repair of tank, tankless, and heat pump water heaters.
Learn More →Slab Leak Detection
Electronic leak detection beneath concrete slabs with minimal disruption.
Learn More →Hydrojetting
High-pressure water jetting to scour pipe walls and restore full flow.
Learn More →Gas Leak Detection
Licensed gas line detection, repair, and pressure testing for safety.
Learn More →Water Filtration
Whole-home softeners, reverse osmosis, and filtration systems installed.
Learn More →Pipe Repair
Expert pipe repair and replacement for copper, PVC, and galvanized systems.
Learn More →Service Coverage
Cities We Serve
We provide fast, local plumbing service throughout the Inland Empire.
Quick Answer
Need commercial plumbing in Ontario, CA? Regal Plumbing & Rooter serves restaurants, offices, retail, apartments, and HOAs throughout Ontario. 24/7 emergency response, backflow certification, preventive maintenance contracts, and all major commercial plumbing services. CA License #1097482. Call (909) 600-4561.
Who We Serve
Industries We Serve in Ontario
Ontario is the Inland Empire’s largest commercial hub, and our commercial book reflects that mix. We service restaurants and quick-service kitchens along the 4th Street corridor, food court tenants and full-service restaurants inside Ontario Mills, lodging properties near Ontario International Airport, and the office and conference space around the Ontario Convention Center. Each of these has different demands — grease loads, peak-hour traffic, ADA compliance, after-hours scheduling — and we plan around them.
We also serve apartment complexes, HOA-managed condo communities, medical and dental offices, auto and industrial properties along Philadelphia St, and warehouse/distribution buildings in the southern Ontario industrial belt. For 24/7 dispatch see commercial emergency plumbing, and for grease and drain line clearing see hydro jetting.
Compliance
Backflow Testing Requirements in Ontario
California Health and Safety Code Section 116800 and Title 17 require annual testing of backflow prevention assemblies on commercial properties. In Ontario, the Inland Empire Utilities Agency and the City of Ontario water department track these certifications and will issue notice if a property falls behind. Restaurants, medical buildings, irrigation systems, and any property with a fire suppression line are typically required to test annually.
We are certified backflow testers — we test the assembly, document results, repair or replace failed devices, and file the paperwork directly with the water purveyor so you stay compliant. If you also have a sewer line or gas line issue, we can roll those into the same visit.
Stay Ahead of Failures
Preventive Maintenance Programs for Ontario Businesses
Our maintenance contracts for Ontario commercial properties typically include quarterly drain inspections, annual backflow testing, water heater anode and pressure checks, grease trap pump-out coordination, and scheduled hydro jetting on heavy-load lines (kitchens, laundries, common-area mains). For apartment and HOA clients we also handle unit turnover plumbing inspections.
Contracts lock in priority dispatch — when a 4th Street restaurant has a backup at 7pm on a Friday, contract clients move to the front of the queue. You also get locked-in hourly rates, monthly consolidated invoicing, and a single point of contact who knows your buildings.
Coverage
Commercial Plumbing Service Area Across Ontario
From Ontario Mills and Ontario International Airport on the north and west, to the Ontario Convention Center and 4th Street dining corridor, to the industrial and warehouse properties on Philadelphia St and Mission Blvd, we cover every Ontario business district. Browse all of our commercial plumbing services or visit our Ontario service area page.
We also serve commercial clients in Rancho Cucamonga, Upland, and Chino. Call (909) 600-4561.
Common Questions
Frequently Asked Questions
Ask about our current specials when you call.
Need a Commercial Plumber in Ontario? Call Now
Local headquarters, licensed, insured, and trusted by Ontario businesses — same-day service available
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