Commercial Plumbing
A sound plumbing system is integral to a commercial building. Our licensed plumbers are experienced with complex commercial systems, from new installation to fast, accurate repairs that limit downtime.
See commercial workCommercial & residential plumbing · El Monte, CA
A tradition of quality and service since 1973.
Frank Marrone & Sons Plumbing is a family-owned and operated plumbing contractor serving Southern California for more than 50 years. Licensed crews for commercial new construction, tenant improvement, hospitals, restaurants, repipes, fire sprinklers and high-pressure gas.
Family owned since 1973 Licensed · CA Lic. #397884 Commercial & residential Prevailing wage & public works
Frank Marrone & Sons
A tradition of quality and service
- In business since1973
- LicenseCA Lic. #397884
- Service areaSouthern California
- WorkCommercial & residential
Family owned & operated since 1973
Licensed · CA Lic. #397884
State, federal & prevailing-wage projects
Serving Southern California
What we do
Proudly serving California for over 50 years.
From complex commercial buildings to custom homes, our licensed professional plumbers handle installation, repairs and maintenance the right way. Choose a service to see the full scope on our current site.
Residential Plumbing
Your home is your greatest investment. We handle repairs of all sizes and new-construction installation for custom homes, multifamily, condominiums, remodels, and sewer, water and gas service.
See residential work
Fire Sprinklers
One of the best ways to protect a property from fire. We design, install, repair and maintain fire sprinkler systems for residential and commercial buildings, sized to the space.
See fire sprinklers
Repipes
When old galvanized or polybutylene pipes rust, clog and leak, we replace them. Experienced with repiping jobs of all sizes, completed in accordance with regulations and code.
See repipesBuilt for complex commercial work
The scope most plumbers can’t take on.
Commercial property plumbing failures are urgent, and the work is demanding. We’re built for it — experienced with the systems, codes and compliance that larger commercial and public projects require.
- State and federal projects
- Prevailing wage projects
- Hospitals and medical & dental offices
- High-pressure gas systems
- Design-build installations
- Subterranean & multi-level concrete deck
- Remodeling and re-piping
Our projects
A range of work across Southern California.
We offer a variety of commercial and residential plumbing services throughout Southern California. A sample of the kinds of projects we take on:
HospitalsMedical & dental facilities
Tenant ImprovementCommercial build-outs
RestaurantsCommercial kitchens
Custom HomesNew residential construction
RepipingGalvanized & polybutylene
Sewer & Sump PumpsSystems & service
State & FederalPublic works projects
High-Pressure GasSpecialized gas systems
See more of our work View projects
About our company
Family owned and operated since 1973.
Frank Marrone & Sons Plumbing Co. was established in October 1973 by Frank Marrone, a union plumber originally from Jersey City, and his wife, Marilyn. Frank Sr. worked out of his home in Arcadia before leasing a building in El Monte, and in 1978 purchased the industrial building on Lower Azusa Road that is still our home today.
His sons, Frank Jr. and Benjamin, grew up in the trade — apprenticing in the summers, working as journeyman plumbers, then moving into scheduling and field layout. By 1998 they purchased the company from their parents and have run it ever since.
Why owners and builders call Marrone
Stable, responsive, and accountable.
50+ years
In business since 1973 — the experience and continuity to start a job and stand behind it.
Family run
Owned and operated by the family directly, so you deal with the people accountable for the work.
Licensed crews
Experienced, professional, dependable licensed plumbers — CA Lic. #397884.
Commercial depth
From hospitals and public works to custom homes, we handle the scope and the compliance.
Start your next project
Contact Marrone & Sons to start your next project.
Tell us about the job and we’ll get you a bid. Call the office during business hours, or send us the details and we’ll be in touch.
- Phone(626) 444-2548
- Fax(626) 444-7126
- Address9860 Lower Azusa Rd.
El Monte, CA 91731 - LicenseCA Lic. #397884
- ReviewsRead us on Yelp