Experienced Residential Plumber in Ontario, CA

Ontario’s Trusted Plumbing Team for 35+ Years

When you need a dependable, honest plumber in Ontario, Cosentino Plumbing is the local name homeowners trust. With more than three decades of hands-on experience and a deep understanding of Ontario homes, we offer fast, reliable solutions for everything from minor leaks to full system overhauls. Our team is licensed, insured, and committed to delivering quality workmanship that solves the problem and prevents future issues. Whether it’s an emergency or a planned upgrade, we get it done right the first time.

Fully licensed, bonded, and insured plumber Ontario homeowners rely on

Available for emergency plumber Ontario calls, including same-day response

Clear, upfront estimates with no hidden charges

Family-owned business with 5-star service and repeat clients across the Inland Empire

Why Ontario Homeowners Call Cosentino Plumbing First

  • Fast Help When You Need It Most

    Plumbing problems can’t wait. We respond quickly to urgent calls—from slab leaks and pipe bursts to severe backups—and arrive prepared. As an emergency plumber in Ontario, we work efficiently to stop damage and restore comfort fast.

  • We Know Ontario Plumbing Systems Inside and Out

    Ontario homes range from historic builds to new developments, and each type comes with its own plumbing quirks. Our experience with copper pipes, PEX systems, and mixed-material retrofits allows us to diagnose and repair issues with minimal guesswork.

  • Fair, Honest Service from a Local Team

    As a long-standing plumbing company in Ontario, we value transparency, respect, and integrity. We explain the problem, offer clear pricing, and only recommend what you truly need—no pressure tactics or hidden upsells.

Full-Service Plumbing Repairs, Upgrades & Installations

From leaking fixtures to full water line reroutes, Cosentino Plumbing offers comprehensive residential plumbing services in Ontario. Whether you’re remodeling, replacing old pipes, or solving a water pressure issue, we do the job right—on time and to code. With top-tier materials and precise techniques, we ensure long-term results and reliable performance.

Toilet, faucet, and shower fixture installations

Drain clearing and clog removal

PointLeak detection and plumbing repair in Ontario

Pipe replacement and water line rerouting

Garbage disposal installations and repairs

Support for remodeling and home upgrades

What to Expect From Our Plumbing Services in Ontario

Leak Detection & Repair

Leak Detection & Repair

Water leaks aren’t always obvious. Hidden behind walls, beneath concrete slabs, or under flooring, they can lead to mold, structural damage, and sky-high water bills. We specialize in fast, non-invasive leak detection using acoustic and pressure-based tools to locate the problem without tearing your home apart. Once located, we repair leaks with precision, ensuring it won’t return.

Clog Removal

Drain Cleaning & Clog Removal

If your sinks, tubs, or floor drains are backing up, our drain specialists can help. We remove blockages caused by grease, hair, roots, or foreign objects using powerful augers and eco-friendly methods. Regular drain cleaning also helps prevent future backups and protects your main sewer line from long-term damage.

Fixture Repair

Fixture Repair & Replacement

Whether you're upgrading your kitchen faucet or fixing a leaking toilet, we handle all fixture-related tasks. We install efficient, modern units from trusted brands and ensure everything is sealed, tested, and ready to perform. No drips, no loose handles—just clean water where you need it.

Water Pressure Troubleshooting

Water Pressure Troubleshooting

Weak water pressure can point to sediment buildup, partially closed valves, or underlying pipe issues. We inspect the full system to identify the culprit and restore strong, steady flow throughout your home—so you can enjoy better showers, cleaner dishes, and faster fills.

Inspections

Plumbing System Inspections

Our full-home plumbing inspections are ideal for Ontario home buyers, sellers, and investors. We check for leaks, corrosion, low pressure, water quality concerns, and outdated systems. You’ll receive a clear report outlining issues, timelines, and recommendations—backed by our honest advice.

Emergency Plumbing Service

Emergency Plumbing Service

Need a reliable emergency plumber in Ontario? We offer urgent dispatch for serious plumbing issues including water line breaks, gas line problems, and sewer backups. Our trucks are stocked with essential tools and parts so we can often resolve the issue on the spot.

Ontario Plumbing FAQs

Do you offer same-day plumbing repairs in Ontario?

Yes—many repairs can be handled same-day. We provide emergency plumber Ontario services for leaks, backups, and major fixture failures. Our team is equipped to diagnose and resolve most issues during our initial visit.

What types of plumbing issues do Ontario homes commonly face?

We see everything from slab leaks and corroded copper pipes in older homes to drainage and pressure issues in newer developments. No matter the age of your home, we’ve seen—and fixed—it before.

Are you licensed and insured for residential plumbing?

Absolutely. Cosentino Plumbing is a licensed plumber in Ontario, and we carry full insurance and bonding. We follow all city and state codes, and our work meets or exceeds industry standards.

Do you help with plumbing during remodels or additions?

Yes—we frequently handle plumbing layouts, upgrades, and fixture installs for kitchen, bath, and laundry remodels. We coordinate with contractors or work directly with homeowners to deliver results that fit your timeline and budget.

Book Plumbing Services in Ontario Today

When you need a prompt, professional plumber in Ontario, Cosentino Plumbing is the team to call. We bring decades of trusted service, clear pricing, and dependable results to every home we visit. Schedule your plumbing service today or request a free estimate—we’re here to help, 7 days a week.