(408) 978-3093

Plumbing Repair, Diagnostics and Maintenance in San Jose, CA

From a mystery noise in the walls to a leak under the sink, our licensed San Jose plumbers find the cause, give you a written price and fix it right, usually on the first visit. And with regular maintenance, many repairs never happen.

  • Google 4.9130+ reviews
  • Licensed C-36 · C-20 · ACSLB License #1101278
  • 1-year labor warranty24/7 service since 1986
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Copper pipe tee with repair clamps in an excavated trench

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Google 4.9 · 130+ reviews · CSLB #1101278 · BBB A+

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Plumbing Repair Services in San Jose

Diagnose, repair, maintain: the everyday plumbing work that keeps a home running.

  • Plumbing diagnostics

    Pressure tests, camera inspections and leak detection pinpoint problems like noisy pipes, low pressure, odors and hidden leaks.

  • Plumbing repair

    Leaking pipes and fittings, valves, faucets, toilets, drains, water heaters and gas lines repaired with parts from a stocked truck.

  • Plumbing maintenance

    Whole-home inspections, water heater flushing, valve exercising, pressure checks and drain care, on your schedule or a service plan.

  • Valves and pressure regulators

    Main and fixture shutoffs, pressure-reducing valves and expansion tanks replaced to protect the system.

  • Water pressure problems

    High pressure that strains pipes, or low pressure from failing regulators and corroded pipe.

  • Plumbing inspections

    For buyers, sellers and homeowners, with an optional sewer camera inspection.

Signs You Need a Plumber

Small symptoms usually point to a bigger cause. Catching them early costs less.

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  • Low or fluctuating water pressure

    A failing pressure regulator, corroded pipe or a hidden leak.

  • Banging, whistling or humming pipes

    Water hammer, high pressure or a failing valve.

  • Unusual water bills

    A jump in use often means a leak.

  • Slow drains and odors

    Buildup in drains or a venting problem.

  • Rusty or cloudy water

    Corroding pipe or a water heater problem.

  • Shutoff valves that won't turn

    Seized valves can't stop water in an emergency.

Diagnosing Plumbing Problems

Many plumbing problems show up far from their cause. Low pressure upstairs can come from a failing regulator at the street; a sewer smell in a bathroom can be a dry trap or a cracked vent; a high water bill can be a toilet running silently or a leak under the slab. Good diagnosis saves money: we test before we replace parts, using pressure gauges, camera inspections and leak detection tools as needed.

Common Repairs

Preventive Plumbing Maintenance

A yearly plumbing check catches the small problems that turn into big ones: a slow leak under a sink, a water heater full of sediment, a shutoff that’s seized, water pressure creeping above 80 psi. Our service plans include maintenance visits, priority scheduling and no inspection fee. Our plumbing maintenance tips cover what you can do between visits. For what you can do yourself between visits, see 15 habits that prevent plumbing problems.

Sources

Checked October 2026.

How Much Does Plumbing Repair Cost in San Jose?

Most repairs are quoted as a fixed price before we start, typically based on $150 to $250 an hour plus parts and drive time. The visit has a $59 inspection fee, waived for service plan members.

Typical plumbing repair prices in San Jose, installed, in US dollars. Checked October 2026.
ServiceTypical San Jose price (USD)
Flat-rate pricingTypically based on $150–$250 per hour, plus parts and drive time
After-hours flat-rate pricingTypically based on $200–$300 per hour, plus parts and drive time, with a minimum charge
Plumbing inspection$150–$400
Plumbing inspection with sewer camera$450–$900
Inspection feeWaived for service plan members$59

What affects the price

  • The repair. Swapping a valve is quicker than a leak inside a wall.
  • Access. Crawlspaces, attics and finished walls add time.
  • Parts. Common parts are on the truck; special orders may need a second visit.
  • Timing. Nights, weekends and holidays are billed at emergency rates.

Most repairs are quoted as a fixed price before we start. Ranges are typical for San Jose and the South Bay and don't include current specials.

Read the plumber cost guide →

How Our Plumbing Repair Visits Work

  1. Book a visit

    Call or book online; we offer same-day visits when we can.

  2. Diagnose

    We find the cause, not just the symptom, using the right test for the problem.

  3. Written price

    You get a written fixed price, with options where there's a choice.

  4. Repair

    Most repairs are done on the first visit from a stocked truck.

  5. Test and clean up

    We test the repair, clean up and walk you through what we did.

  6. Maintenance advice

    We point out anything that will need attention soon, without pressure.

Plumbing in San Jose Homes

Repairs we see most often across San Jose and the South Bay.

  • Aging pipe

    Galvanized steel in pre-1970s homes and polybutylene in some 1980s and 1990s homes are frequent sources of leaks.

  • Hard water

    Moderately hard water wears faucet cartridges, toilet valves and water heaters.

  • High pressure

    Where street pressure is above 80 psi, a pressure regulator is required by code and protects every fixture.

  • Slab homes

    Leaks under slab foundations are common in mid-century ranch homes.

Neighborhoods we serve: Downtown San Jose · Willow Glen · East San Jose · South San Jose · Evergreen · Cambrian Park · West San Jose · Berryessa · North San Jose · Blossom Valley

Current Specials

Save on your visit. Mention the offer when you book.

What Our Customers Say

Google 4.9 from 130+ reviews: read more →See photos of our work →

  • Great, reliable, and timely service at a reasonable price. I shopped around quite a bit before landing on CPI. Their rates were competitive, they responded promptly, and their plumber fixed a few issues quickly and without much fuss. I’ll definitely be calling them again the next time we have issues!

    Allan H.Google review

  • Prompt response, polite, knowledgeable. Good at explaining options and following through until solved.

    Pauline M.Google review

  • CPI Service was sent to my home by my condominium association. They agreed to a very early morning appointment and the gentleman arrived exactly on time. He went through the problem very methodically to see where the problem was. Something that no one else could figure out was taken care of in half an hour. I would very definitely recommend them.

    Fern F.Yelp review

Plumbing Repair FAQs

What does the $59 inspection fee cover?

A licensed plumber's visit to diagnose the problem and give you a written price for the repair. It's waived for service plan members.

Do you charge by the hour or by the job?

By the job. Repairs are quoted as a fixed price before work begins, so you know the cost up front. Our prices are typically based on $150 to $250 an hour plus parts and drive time, and $200 to $300 an hour, with a minimum charge, for after-hours emergencies.

How often should plumbing be inspected?

A whole-home check every year or two catches small leaks, worn valves and high pressure early, especially in older homes. See our plumbing inspection guide.

What's included in plumbing maintenance?

Checking for leaks, testing pressure, exercising shutoffs, flushing the water heater, inspecting toilets, faucets and drains, and noting anything near the end of its life.

Can you fix it on the first visit?

Usually, yes. Our trucks carry common parts; special-order parts may need a second visit.

Helpful Guides

Serving San Jose and the South Bay

Our shop is at 2880 Aiello Dr in San Jose. We provide plumbing repair across the city and nearby South Bay and Peninsula communities. See our full service area.

Content and prices reviewed October 2026.

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