Ralph Gunderson Plumbing, Inc.

Gunderson Plumbing, Inc. is a trusted family-owned company based in Wonder Lake, Illinois, proudly serving McHenry County and surrounding areas for over five decades. With a strong reputation for high-quality plumbing services, their experienced team combines traditional expertise with modern tools to handle everything from routine maintenance to urgent repairs.

One of their core offerings is septic system pumping and maintenance, a vital service for properties using on-site waste treatment. Gunderson Plumbing ensures the process is carried out safely, efficiently, and in full compliance with environmental regulations. Their experts perform thorough diagnostics, routine maintenance, and timely repairs to keep your system running smoothly and prevent costly issues.

The company also specializes in drain cleaning and hydro-jetting, using high-pressure water technology to eliminate blockages caused by grease, debris, and buildup. This method not only restores proper drainage but also helps prevent future clogs and extends the lifespan of your plumbing system. Whether it’s a kitchen sink, shower, or main sewer line, their team delivers fast, non-invasive solutions with lasting results.

In addition, Gunderson Plumbing provides comprehensive backflow prevention testing and service, helping to protect your water supply from contamination. This is especially important for both residential and commercial buildings, where regular inspections ensure compliance with local safety standards. Their licensed technicians perform detailed testing and complete certification, giving clients peace of mind and regulatory assurance.

Every service begins with a free estimate and a transparent overview of the scope, pricing, and timeline—there are no hidden fees. The company values clear communication, prompt response, and a clean work environment. After completing a job, technicians ensure your space is left tidy and fully operational.

Gunderson Plumbing is known for its commitment to excellence, safety, and client satisfaction. Their reputation is built on decades of consistent, reliable work and strong relationships within the community. Whether you’re dealing with a full septic tank, a stubborn clog, or need to upgrade your backflow system, they provide dependable solutions tailored to your needs.

For homeowners and businesses seeking trustworthy plumbing professionals, Gunderson Plumbing, Inc. remains the go-to provider for responsive, expert service delivered with care and integrity.