Where honesty and integrity

come first.

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Our
Services

  • Decks and Patios icon

    Residential Plumbing

    We keep your home's pipes and fixtures flowing.

  • Outdoor Spaces icon

    Specialized Services

    Expert solutions for unique plumbing and gas line challenges.

  • Custom Additions icon

    Remodeling and New Builds

    Transforming your spaces with our plumbing expertise.

  • Green Building icon

    Green Building

    Improving your water quality for healthier living.

Projects

  • Oranssi project: studio shed

  • Oranssi project: roof expansion

  • Oranssi project: wraparound deck

  • Oranssi project: passive house

  • Oranssi project: slat roof

  • New List Item

Ready to Build Your Vision?

Your vision deserves expert craftsmanship and personalized attention. That's exactly what Principled Plumbing Systems delivers. Whether you're dealing with an older home that needs updating, want to incorporate the latest water-saving technologies, or have a unique design in mind, we're up for the challenge. Our creative approach and technical expertise ensure that no vision is too ambitious. Let's collaborate and find innovative solutions to bring your plumbing dreams to life.

Where honesty and integrity come first.

At Principled Plumbing Systems, our name reflects our commitment to honest, ethical service. Established in 2023, our Grass Valley-based family business has grown through word-of-mouth recommendations from satisfied customers. We believe in transparency, fair pricing, and doing the job right the first time. When you choose Principled Plumbing Systems, you're not just getting a service provider – you're partnering with a local business that values its community and stands behind its work.

Owner Keeth, with his hands-on experience and dedication to the craft, has built a reputation for excellence in both residential and commercial plumbing services. Our small, agile team brings big expertise to every project, ensuring top-quality results and customer satisfaction. From routine maintenance to complex installations, we're equipped to handle all your plumbing needs with skill and integrity.

Our company brings a personal touch to every job, treating your plumbing needs with the same care we would our own home. With deep roots in the community, we understand the unique plumbing challenges of our region and are committed to providing honest, reliable service to our neighbors.

Take Our Clirent's Word For It

  • "I feel so grateful I came across Keether and his company. They are efficient, kind, and trustworthy. Keether promptly answered my call and saved the day. They will forever remain my go to people for any future problems. You can't go wrong with these guys!"

    Olivia Hardt

  • "Keeth proved an exceptional plumber who I would hire again. He repaired a pipe leak in a tight crawl space underneath our house, replaced parts in one of our toilets to stop a leak and improved its efficiency, cleared a pipe blockage, and replaced bathroom sink parts to stop a leak. We’ve had no recurrent issues since he performed this work. Based on our experience with other plumbers, we found Keeth able to quickly diagnose and repair plumbing issues and consider ourselves fortunate to have hired him based on a referral from our neighbor who is a real estate agent."

    Bob Garza

  • "I have had the pleasure having Keeth do work for us both at our restaurant and home. I was in the trades for 35 years and rare that I would be willing to refer so many tradesman, Keeth is one whom I love to refer. First and foremost it begins with integrity and he has integrity in spades. Principle plumbing has always been on time, never late which is rare along with quality work. Don’t hesitate and call now for a terrific plumber."

    Michael Sterner

  • "I cannot say enough wonderful things about Keith!!!! He has gone above and beyond to communicate with me in regards to a complete plumbing remodel. He is quick to ask for clarifications and not shy to recommend better options. He takes pride in his work which is not often experienced these days. Truly, he has been a joy to work with. I strongly recommend you use Keith for all you plumbing needs. You will be in good hands!!!!!!!"

    Vicki Day

  • "3 months ago Keether is absolutely the first and only plumber I'll call. He shows up when he says. He knows what he's doing. He does it right the first time. Priced very fairly."

    Charisse L.

  • "Keeth is absolutely amazing! He is hands down my number 1 plumber! Not only do I go to him for all the plumbing needs in my own house, I’m a Realtor and refer him to do the work in all of my clients’ homes! Always reliable, efficient, responsive and reasonably priced. Plus he’s a wonderful man and very enjoyable to work with!"

    Sarah Stone-Francisco