Leak Detection & Repair in San Jose

Licensed Plumbers Serving the Bay Area Since 1983

Hidden leaks don’t announce themselves. By the time a soggy patch appears or a water bill spikes, damage has usually been building for weeks. CMS Plumbing is a licensed and insured plumbing company with over 40 years of experience, and we bring dedicated detection equipment to every leak call in San Jose so we know exactly what we’re fixing before we touch a pipe.

Call us any time at (408) 669-4222 for a free estimate on leak detection and repair. We offer emergency after-hours service for situations that can’t wait.

How We Approach Every Leak Job

Our process starts with diagnosis, not assumptions. We use advanced leak detection tools and proven inspection techniques to pinpoint the exact source before recommending any repair. Once we’ve located the problem, we walk you through your repair options in plain language and review any San Jose permitting requirements that apply.

You receive a detailed, upfront estimate before work begins. No hidden charges, no surprises on the invoice. When a repair involves public utilities or city infrastructure, we handle the City of San Jose permit approvals on your behalf, so you don’t have to navigate that process alone. When the job is done, our work is backed by a labor warranty.

For leaks that require excavation, our PG&E Certified Dig Safely OQ Card certification means underground access is handled to utility-safety standards, protecting your property and the lines beneath it.

Signs Your San Jose Home May Have a Hidden Leak

Some leaks are obvious. Many aren’t. Watch for these warning signs:

• Unexplained water bill increases when usage habits haven’t changed
• Low water pressure at fixtures throughout the house
• Damp, soggy, or discolored spots on walls, ceilings, or in the yard
• Musty odors suggesting moisture behind a surface
• The sound of running water when no fixtures are in use
• Warm spots on flooring, which can point to a slab leak in a hot water line running beneath the concrete foundation

San Jose properties face a particular combination of risk factors: shifting clay soil, aging pipe systems, and mature urban tree canopies. Older neighborhoods like Willow Glen, Rose Garden, and Almaden Valley often have original piping that’s more susceptible to corrosion and breakage. Root intrusion into water lines is common in these areas, and the city’s complex infrastructure means reduced water pressure or sudden bill spikes can have several possible sources. We know these neighborhoods and the patterns we typically find there.

Start with a Free Estimate

Calling us doesn’t commit you to anything. We provide a free, detailed estimate after diagnosis so you can make an informed decision. If you’re seeing any of the warning signs above, or if something just doesn’t feel right about your water system, reach out before the problem grows. We’re available for emergency after-hours calls and serve homeowners throughout San Jose and the surrounding Bay Area.

Call CMS Plumbing at (408) 669-4222 or use our contact form to schedule leak detection and repair service today.