(408) 978-3093

Toilet Repair and Installation in San Jose, CA

Running, leaking, clogged or overflowing? Our San Jose plumbers fix toilets of every brand, clear clogs without scratching the bowl, and install new and pre-purchased toilets with a new wax ring, flange check and leak test. Most toilet repairs cost $150 to $600; new toilet installation is quoted as a fixed price.

  • Google 4.9130+ reviews
  • Licensed C-36 · C-20 · ACSLB License #1101278
  • 1-year labor warranty24/7 service since 1986
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Plumber clearing a clogged toilet with a toilet auger

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

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Toilet Plumbing Services in San Jose

From a worn flapper to a full replacement, done right the first time.

  • Toilet repair

    Running toilets, weak flushes, slow refills, phantom flushing and handle problems fixed with new fill valves, flush valves, flappers and tank parts.

  • Clogged toilet repair and snaking

    Toilet augers designed not to scratch porcelain clear clogs and objects; we check the main line if toilets keep backing up.

  • Overflowing toilets

    Turn the shutoff valve behind the toilet clockwise and call. We clear the blockage and find out why it overflowed.

  • Wax ring and flange replacement

    Rocking toilets and water at the base fixed with a new wax ring or seal, flange repair and a leak test.

  • New toilet installation

    Any brand, including toilets you've already bought, installed with new supply line, shutoff check and wax ring; old toilet hauled away.

  • Water-saving and comfort upgrades

    High-efficiency and dual-flush toilets, comfort-height bowls, soft-close seats and bidet seats.

Signs Your Toilet Needs Repair

A toilet problem wastes water and can damage the floor. Call when you notice these.

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  • It keeps running

    Usually a worn flapper, a misadjusted float or a failing fill valve.

  • Water on the floor at the base

    A failed wax ring or cracked flange, which can rot the subfloor if ignored.

  • Weak or incomplete flushes

    Low tank water, a partially blocked trap or mineral buildup in the rim holes.

  • Frequent clogs

    A partial blockage in the trap or drain, or an old low-flow design.

  • The toilet rocks

    A loose or broken flange, or a floor problem under the toilet.

  • Several fixtures back up when you flush

    Water rising in the tub or shower when you flush means the main sewer line is blocked.

Common Toilet Problems We Fix in San Jose

  • Running toilet. A flapper that doesn’t seal (worn flappers top the EPA’s list of common household leaks), a float set too high or a worn fill valve lets water trickle into the bowl, sometimes hundreds of gallons a day.
  • Phantom flushing. The tank refills on its own because water slowly leaks into the bowl.
  • Weak flush. Low tank level, mineral-clogged rim jets or a partial clog in the trap.
  • Leaks at the base. A failed wax ring or broken flange lets water seep under the floor.
  • Leaks at the tank. Worn tank-to-bowl gaskets, bolts or supply connections.
  • Clogs. Too much paper, wipes or objects; a toilet auger clears them without scratching the bowl.

Our Toilet Installation Process

We confirm the rough-in measurement and the toilet you want (or install the one you bought), shut off the water and remove the old toilet. Then we inspect the flange and subfloor, repair the flange if needed, set the new toilet on a new wax ring or wax-free seal, connect a new supply line, and check the shutoff valve. We finish by leveling, caulking where appropriate, testing several flushes for leaks, and hauling away the old toilet.

Repair or Replace?

Repair worn parts in a sound toilet. Consider replacement if the porcelain is cracked, it clogs often, it’s an older model using far more water than today’s 1.28-gallon toilets, or you’ve repaired it more than once in the past year. A new high-efficiency toilet can pay for itself in water savings, and it’s a good time to add a soft-close or bidet seat.

Sources

Checked October 2026.

How Much Does Toilet Repair Cost in San Jose?

Most toilet repairs in San Jose cost $150 to $600. New toilet installation is quoted as a fixed price, depending on the toilet and the flange and supply connections.

Typical toilet repair and installation prices in San Jose, installed, in US dollars. Checked October 2026.
ServiceTypical San Jose price (USD)
Toilet repair$150–$600
Clog beyond the toilet (drain cleaning)$250–$600
Flat-rate pricingTypically based on $150–$250 per hour, plus parts and drive time
Inspection feeWaived for service plan members$59

What affects the price

  • The repair. A flapper or fill valve is quick; a broken flange or subfloor repair takes longer.
  • The toilet. One-piece, wall-hung and smart toilets take more time to install.
  • Shutoff and supply. A seized shutoff valve is replaced at the same time.
  • Clogs. If the clog is in the main line, it's a drain cleaning job.
  • 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 toilet repair cost guide →

How Our Toilet Service Works

  1. Call or book online

    Overflowing or only toilet? We prioritize it, with a 24/7 line.

  2. Diagnose

    We check the tank parts, seal, flange, supply and drain to find the real cause.

  3. Written price

    You get a written price for repair or replacement before we start.

  4. Repair or install

    Shoe covers on, floors protected. Installs include a new wax ring and supply line.

  5. Test

    We flush repeatedly and check for leaks at the tank, supply and base.

  6. Clean up

    We clean up and haul away the old toilet.

Toilets in San Jose Homes

Local factors behind the toilet problems we see most.

  • Hard water

    Moderately hard South Bay water leaves mineral deposits in rim holes and fill valves, weakening flushes over time.

  • Water conservation

    California requires new toilets to use no more than 1.28 gallons per flush. Replacing an old toilet saves water every day.

  • Older sewer laterals

    If toilets back up repeatedly, roots in an older clay lateral are a common cause; see drain and sewer cleaning.

  • Condos and HOAs

    We work with property managers across the South Bay, and an overflowing toilet upstairs is a common HOA call.

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 →

  • I called CPI Plumbing after my daughter flushed some snack wrappers down the toilet and the toilet was not flushing properly. I also tried to do it myself with a plunger and a snake, but it wasn’t working out and I probably wasn’t doing it right. When the plumber from CPI arrived, he was friendly and was confident he could fix our issue. He used specialized equipment specifically for toilet clogs, that also would not scratch the inside of the toilet bowl, and was able to clear the issue within 10 minutes. He also wore shoe covers inside the house and made sure to clean everything up before he left. The price was also very reasonable. Great service, great plumber, great value!

    Marshall L.Google review

  • Our HOA manager recommended CPI when our toilet overflowed on a Saturday evening in July. They picked up the phone at 8:30pm on a Saturday night. One of their plumbers showed up 30 minutes later. He quickly determined that the clog was a bigger issue further down the sewer line which required a professional hydro jetting cleaning to resolve. After checking with the HOA manager, CPI sent a jetter machine and another plumber within half an hour. Their crew worked until 11:30pm to clear the clog. We were so happy that we could use the bathroom again! CPI was responsive, communicated well, worked fast, and resolved the issue during off-hours. We will definitely call them again.

    Hattie C.Yelp review

  • First I had a visit from Matt who said a couple parts had to be ordered for a phantom flushing toilet when no-one was near it. He took a long time explaining to me the problem and wondering why I never saved the guarantee (I bought the fixture in 2009). When he left, he said he would try to order parts. I was left guessing whether he would follow through or the faulty issue would continue forever. Lo and behold, the hero appeared in the form of Isaac after I spoke to the office manager, Denise, on the phone.. Isaac had purchased the parts and in late afternoon showed up to install them, which he did. Isaac was cheerful and efficient. The parts have a 90 day guarantee (plumbing law or something), but hopefully they will long outlive this. Way to go, CPI, for following up immediately to complete this job.

    Danielle W.Yelp review

Toilet Repair and Installation FAQs

How much does toilet installation cost in San Jose?

It depends on the toilet and the condition of the flange, shutoff and supply line. We give you a fixed price before we start. Most toilet repairs cost $150 to $600.

What's the most common toilet repair?

A running toilet, usually from a worn flapper, a misadjusted float or a failing fill valve.

Is it better to repair or replace a toilet?

Repair is cheaper for worn parts. Replace a toilet that's cracked, clogs often, wastes water, or needs repeated repairs.

How do I fix a running toilet?

Check that the flapper seals and isn't warped, adjust the float so the water stops below the overflow tube, and replace the fill valve if it keeps hissing. If it still runs, the flush valve may need replacing.

What should I do if my toilet overflows?

Turn the shutoff valve behind the toilet clockwise to stop the water, or lift the tank lid and raise the float. Don't flush again. If other drains back up too, stop using water and call.

How long does toilet installation take?

Usually two to four hours, longer if the flange or shutoff valve needs replacing.

Helpful Guides

Serving San Jose and the South Bay

Our shop is at 2880 Aiello Dr in San Jose. We provide toilet repair and installation 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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