About Down Under Plumbing in San Rafael, CA

With a specialization in new construction and remodels since 1998, we have extensive experience working with general contractors on residential projects throughout Marin and Sonoma. Our deep understanding of building systems allows us to handle everything from rough-in plumbing to final fixture installations, ensuring everything is up to code and built to last for your San Rafael home.

For San Rafael homes, we proactively address storm drain issues by inspecting for proper drainage and potential blockages, especially important with our local weather. For gas lines, we perform thorough inspections for corrosion—a common concern in older homes—and provide safe repairs or replacements using materials and methods that meet strict local safety codes to protect your household.

Yes, water heater installation is a core service. Given local codes and efficiency standards, we help you choose the right unit (tank vs. tankless, gas vs. electric) for your home's needs and layout. Our installation includes proper venting, pressure valve setup, and compliance with all California and San Rafael regulations for safety and performance.