Your Reliable Plumbing Partner

The Best Plumbing Service Provider in the Bay Area

Mammoth Plumbing offers transparent pricing, round-the-clock emergency service, and outstanding plumbing solutions throughout San Francisco and the Bay Area.

A copper sink with a faucet and a window in a kitchen.
A red swirl on a white background.

Licensed & Insured

A red swirl on a white background.

100% Satisfaction Guarantee

A red swirl on a white background.

24/7 Emergency Service

A white van with a toilet in the back is parked on the side of the road.

About Mammoth Plumbing

For many years, Mammoth Plumbing has provided outstanding plumbing services to San Francisco and the neighboring communities. Whether it's a straightforward repair or a complicated installation, our team of certified experts brings unparalleled experience to every project. We take pride in being a locally owned company that is aware of the particular plumbing issues that businesses and homeowners in Marin County and the Bay Area peninsula face.

Our Services

We offer comprehensive plumbing services designed to address all your needs with expert precision and care. Each service is performed by our highly trained technicians, who arrive equipped with advanced tools and extensive knowledge.

Three copper pipes are connected to each other on a wall.

Residential Plumbing

We provide complete residential plumbing services, including house repiping, gas line installation and repair, clog and leak repair, toilet installation and maintenance, shower and tub services, garbage disposal repairs, and preventative maintenance programs throughout San Francisco, Daly City, Brisbane, San Bruno, Millbrae, Burlingame, San Mateo, and Hillsborough.

A water heater is sitting in a room next to a wall.

Water Heaters

Our water heater experts install and service energy-efficient tankless systems, repair conventional units, and handle complete replacements, guiding homeowners from San Francisco to Hillsborough in selecting the perfect option based on household needs, helping you enjoy reliable hot water while maximizing energy efficiency.

A room under construction with a window and pipes

Sewers & Drains

Our specialized technicians handle sewer replacements, repairs using advanced pipe lining, professional drain cleaning, comprehensive drain repairs, and video diagnostic services to permanently resolve issues for homes across Brisbane, Broadmoor, San Bruno, and throughout the peninsula with minimal disruption.

Why Choose Professional Plumbing Services

Mammoth Plumbing offers thorough expert services that take care of current problems and stop them from happening again. From traditional systems in older San Francisco homes to contemporary, environmentally friendly installations in newer Burlingame and San Mateo properties, our technicians receive ongoing training to stay up to date on the newest plumbing technologies and techniques. 


We provide long-lasting results by using professional-grade equipment and supplies that the typical homeowner cannot afford. Additionally, our work is supported by guarantees and warranties, giving you peace of mind long after the job is finished.

A person is holding a blue level next to a pipe.

Our Simple Process

A black and white icon of a phone with a clock inside of it.

Rapid 24/7 Response

Pipes bursting at midnight? Toilet overflowing on Sunday? Count on emergency service across San Francisco, Daly City, and Brisbane within hours, because water damage won't wait for business hours.

A magnifying glass with a check mark inside of it.

Diagnose the Real Problem

No quick patches that leave you calling back next month. Our experts diagnose what's actually causing your plumbing troubles, from invasive tree roots to aging pipes. The focus stays on permanent solutions, not temporary fixes.

A black and white silhouette of a light bulb on a white background.

Solutions, Not Surprises

Expect clear explanations, upfront pricing, and realistic timelines—all before work begins. Whether servicing historic Hillsborough homes or busy San Bruno restaurants, every property receives the same respectful, thorough attention to detail

FAQs

  • How quickly can you respond to a plumbing emergency?

    We provide 24/7 emergency service with typical arrival times of 30-90 minutes for San Francisco and surrounding areas, prioritizing all emergency calls regardless of location.

  • What causes low water pressure in my home?

    Common causes include pipe corrosion, mineral buildup, hidden leaks, or municipal supply issues. Our diagnostic process pinpoints the exact cause for an effective solution.

  • How often should I have my drains professionally cleaned?

    We recommend every 1-2 years for most homes. Properties with large families, older plumbing systems, or tree root issues may need more frequent service.

  • Is a tankless water heater worth the investment?

    Yes, for most Bay Area homes. They offer 20+ year lifespans, 20-30% energy savings, endless hot water, and space-saving designs, typically paying for themselves over time.

  • How do I know if I need repiping rather than spot repairs?

    Consider repiping if you have frequent leaks, discolored water, dropping pressure, or visible corrosion. Homes built before 1970 often benefit more from complete repiping.

  • What maintenance does my water heater need?

    Annual maintenance should include tank flushing, pressure relief valve checks, anode rod inspection, and temperature setting adjustments for optimal performance.

  • How can I prevent clogged drains?

    Use drain screens, avoid disposing of fats down drains, use garbage disposals properly, and flush drains periodically with hot water.

  • What's the difference between a sump pump and a sewage ejector pump?

    Sump pumps remove groundwater from basements or crawlspaces. Sewage ejector pumps move waste from below-grade fixtures to the main sewer line.

  • How do you diagnose sewer line problems?

    We use high-definition video camera inspection to examine sewer lines without excavation, precisely identifying problems for targeted repairs.

  • Are water-efficient fixtures worth installing?

    Yes. They typically pay for themselves within 1-2 years through reduced water bills, while conserving resources and reducing strain on infrastructure.