Frequently Asked Questions

Yes. Mason Plumbing provides free estimates for plumbing service, repair, and installation throughout Marin County. Call 415-456-4554 or send us a message online to get started.

We serve all of Marin County, California, including San Rafael, San Anselmo, Fairfax, Ross, Kentfield, Larkspur, Corte Madera, Mill Valley, Sausalito, Tiburon, Novato, and surrounding communities. If you live or work in Marin County, we can be your plumbing company.

Yes. Mason Plumbing holds California Contractor License #817803, is fully bonded and insured, and is Diamond Certified, rated highest in quality by independent customer surveys for 10 consecutive years.

We handle sewer and drain cleaning (including hydro jetting and video inspection), water heater repair and tankless installation, recirculating pump installation, water-conservation upgrades, leak detection and repair, seismic gas shut-off valves, garbage disposals, and full plumbing remodels for homes and businesses.

Based in central Marin (San Anselmo), we are close to supply warehouses and can often be on the way within one to two hours of your call during business hours. We stock common parts, which often lets us avoid extra return trips.

As a general rule: if your water heater is under 8 years old and the repair cost is less than half the price of a new unit, repair it. If it is over 10 years old, showing rust in the water, or experiencing repeated failures, replacement is almost always the better investment. We will give you an honest recommendation either way.

A drain snake breaks apart a clog. Hydro jetting removes it entirely. At 4,000 PSI or more, high-pressure water scours the entire pipe wall, removing grease, scale, and roots completely. We use snakes for simple clogs and hydro jetting for recurring problems, root intrusion, or buildup that has narrowed the pipe.

Watch for slow drains throughout the house (not just one fixture), gurgling sounds when you flush, foul odors from drains, or recurring clogs. Any home over 30 years old in Marin County with clay sewer lines benefits from a camera inspection, even without obvious symptoms.

Yes. We back all plumbing installations with a 2-year labor warranty, plus the factory warranties on any materials we supply.

Mason Plumbing is a family-owned business founded in 2003 by Cameron and Kamber Mason, based in San Anselmo. It is now a second-generation family company, still personally managed by the owners on every job.