Harry Clark has been a San Lorenzo Plumbing Contractor for over 60 years. Harry Clark started a service company called Grand Ave. Plumbing in 1946 and later moved to San Lorenzo Ave. Harry Clark along with his wife Madeline, ran a successful company. Some years later Mr. Clark passed away. Madeline Clark, came from a family of plumbers and had worked with her father when growing up. Madeline was not ready to retire, or sell. She applied and succeeded in becoming a California licensed plumbing contractor. She was one of the first in this state.

In 1976 Mrs. Clark was ready to retire. She found Donald and Beverly Marshall, who worked in the industry since 1952. They bought the company. They continued the tradition of the local company specializing in service. They hired their youngest son Brad Marshall, a union trained journeymen in 1985. By 1989 Donald and Beverly were ready to retire. They sold the company to their two son's, Brad and Don Marshall.

Today, Harry Clark retains its roots as a specialized service company. They have expanded the service base to include: sewer repair and replacement, heating and air conditioning service and installation. Today's company enjoys the status of a premier service contractor serving the Bay Area's needs.

San Lorenzo Heating Contractor
San Lorenzo weather is nice but when the fog or wind rolls in, it is cold. Whether you need service or repair of your old heating system or need replacement with new, Harry Clark is your San Lorenzo Heating Contractor. We are highly rated by the Berkeley Parents Network, BBB, and Consumer Checkbook. We Feature Energy Star Furnaces and thermostats, and out technicians are properly trained. Call for service you can trust.

Tankless Water Heater
Tankless water heaters are part of our environmental focus. A Tankless Hot Water Heater or On Demand Water Heater instantly heats water as you need it as opposed to using energy around the clock like typical hot water heaters do. Tankless systems reduce your energy consumption and utility bills while also providing you with an unending source of hot water! We offer Takagi® tankless systems for their superior efficiency ratings. Learn more: Tankless Systems.

Trenchless Sewer
Harry Clark specializes in Trenchless sewer installations to save landscape from the typical destruction caused by trenching. Trenchless is not only the newest method to replace you existing system but is the best! Find out more: Trenchless Sewer.

San Lorenzo Air Conditioning Contractor
When the California summer sun cuts through the cool breeze off the Pacific, you want an efficient and reliable system keeping your indoor air cool. We provide air conditioners and heat pumps that use R-410A refrigerant and have high SEER ratings to save on our environment and your utility bills. Learn more about air conditioners and other products we offer!

San Lorenzo Neighborhood Contractor
We service and know the neighborhoods of San Lorenzo . We have serviced all of San Lorenzo Neighborhoods. Don and Brad were both born in Hayward and raised in San Lorenzo. Our family home is still on Keller Avenue. We lived, went to school, and worked in San Lorenzo. Nobody knows these home better than us.

Indoor Air Quality
Did you know that the EPA has shown indoor air can be several more times polluted than the air outdoors? Today modern homes are great at sealing out the elements with tight, efficient seals. However this in turn recycles pollutants, toxins, bacteria and mold into the air you breath. Harry Clark provides a suite of indoor air quality products that integrate into your HVAC system and work together to purify your indoor air. Learn more: Indoor Air Quality Products

If you have any questions, please do not hesitate to call us at . If you would like to schedule service online, just visit our service request form. Thank you for your interest in Harry Clark of San Lorenzo, CA!