Hidden plumbing leaks can quietly damage your home before they're visible. John Owens Services has helped Mill Valley homeowners accurately locate water, slab, gas, and irrigation leaks since 1986 using professional diagnostic equipment and practical repair recommendations.
A hidden plumbing leak doesn’t always leave obvious clues. Water may escape beneath a concrete slab, inside walls, below crawlspaces, or under landscaping for weeks before you notice rising water bills, damp flooring, or musty odors.
John Owens Services provides professional leak detection throughout Mill Valley. Our technicians use specialized diagnostic equipment to pinpoint hidden leaks while minimizing unnecessary demolition. Once we’ve identified the source, we’ll explain exactly what we found and recommend the most practical repair.
Many Mill Valley homes have aging plumbing systems, hillside construction, or older water lines that require careful diagnosis before repairs begin. Our goal is always to locate the problem first, then recommend the right solution—not guess.
If repairs are needed, we also provide Plumbing Repair, Water Heater Repair, and Drain & Sewer Services throughout Mill Valley.
Since 1986, we’ve helped homeowners throughout Marin County solve plumbing problems with honest recommendations and careful diagnostics. The John Owens Way is simple: maintain your plumbing whenever possible, repair when needed, and recommend replacement only when it truly provides the best long-term value.
We locate water supply leaks, slab leaks, gas leaks, irrigation leaks, radiant heating leaks, and many other hidden plumbing leaks.
Our goal is to locate the leak as accurately as possible before any demolition begins. Once the leak is identified, we’ll explain what access is needed for repair.
Yes. After diagnosing the source, we can discuss repair options and complete many plumbing repairs.
Yes. We regularly work on older homes throughout Mill Valley and understand the plumbing challenges commonly found in these properties.
Leave the area immediately, avoid creating sparks or flames, and contact your gas utility. Once the situation is safe, we can inspect your gas piping.
Yes. We have extensive experience with Eichler plumbing systems and radiant heating systems throughout Marin County.
From the Marin coast to Sonoma wine country, we bring honest plumbing, heating & cooling to homeowners across both counties — based locally since 1986.