24/7 WATER HEATER LEAK REPAIR · LOS ANGELES · SAN GABRIEL VALLEY · SAN FERNANDO VALLEY

Water Heater Leaking? Here’s What to Do Right Now, and We’ll Be On Our Way.

Real people answer 24/7. We find exactly where the water is coming from, tell you straight whether it can be repaired, and give you a written price before any work starts.

  • Licensed CA #1067555
  • Bonded & Insured (incl. workers’ comp)
  • Family-Owned Since 1997
  • 5.0 ★ on Google (300+ reviews)

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Do this first (it takes two minutes)

If your Granada Hills water heater is acting up, here’s what we see most:

Shut off the cold water supply valve on the pipe going into the top of the heater. That stops the tank from refilling.

Gas heater: turn the gas control knob to OFF. Electric heater: switch off its breaker.

Move anything that can get wet, and take a few photos of the leak and any damage.

Call us at (626) 956-3708. A person answers, day or night.

If you smell gas, don’t touch anything. Leave the house, then call SoCalGas at 1-800-427-2200 from outside, and call 911 if there’s damage or danger. Don’t turn lights or appliances on or off, and don’t try to fix the gas line yourself.

Can a leaking water heater be repaired?

Often, yes. If the water is coming from a valve, a fitting, or a connector, it’s usually a repair, and usually the same day. If the water is coming from the tank itself, it can’t be patched. A tank leaks when its steel shell has rusted through from the inside, and the only real fix is a new water heater.

Age matters too. The U.S. Department of Energy puts the life of a storage water heater at about 10 to 15 years and a tankless unit at about 20. A leak on a tank past its first decade is usually the heater telling you it’s time.

Water heater leaking from the bottom of the tank in a Los Angeles home

Where is it leaking from? That tells us almost everything

Where the water is
Most likely cause
Usually

Top of the heater

Loose inlet or outlet fitting, a worn flex connector, or the anode port

Repair

Relief valve or its pipe

Too much pressure or heat, or a failing temperature-and-pressure relief valve

Repair (and find out why it opened)

Drain valve near the bottom

Worn or loose drain valve

Repair

Bottom of the tank or under the jacket

The tank has rusted through

Replace

Tankless unit

A fitting, the relief valve, or the heat exchanger

Fittings: repair. Heat exchanger: often replace

Drips only on a cold start

Condensation, especially on a new or high-efficiency heater

Often nothing to fix

Water around a heater isn’t always the heater. A leaking supply line or a hot water line under the slab can pool in the same spot. We check before we quote. If it turns out to be a slab leak, our leak detection team finds the exact spot.

New water heater replaced

What it costs

You get a written price before any work starts. To give you a realistic idea before you call:

  • Valve, fitting, and connector repairs are usually a small fraction of the cost of a new heater, and we quote them on the spot.
  • Replacing a leaking tank, or switching to tankless, typically runs from about $1,200 to $4,500 or more, depending on size or model, venting and gas line changes, where the heater sits, and the permit.
  • Permit, seismic strapping, code updates, and haul-away of the old heater are in the written quote, not added later.

Replace it right: the code items we include

A new water heater is only as safe as its installation. On every replacement, we:

Strap the heater against earthquakes. California Health & Safety Code §19211 requires new and replacement water heaters to be braced, anchored, or strapped.

Install a drain pan where the code calls for one. The California Plumbing Code requires a pan, at least 1½ inches deep with a ¾-inch drain to an approved location, when a heater sits in an attic or over a floor or ceiling that a leak would damage. That’s the pan that saves the ceiling below a closet heater.

Run the relief valve discharge to a safe spot outside, turned down and ending 6 to 24 inches above the ground, with no threads on the end, so a relief valve that opens can’t scald anyone or flood the house.

Pull the permit. For a single-family home in the City of Los Angeles, LADBS requires a permit to replace a gas water heater unless the contractor is a registered Certified Licensed Contractor doing a same-size, like-for-like swap. Pasadena, Glendale, and the other cities we serve have their own permits. We handle it either way.

Garages, closets, attics and condos

Where your heater sits changes how urgent a leak is. A garage heater on a platform can drip for a while before it does real damage. A heater in a hall closet or an attic can soak drywall, flooring, and the ceiling below in an hour. In apartments and condos, a leak often shows up first in the unit downstairs.

If you rent or live in a building with an HOA, call us anyway. We can work with your landlord or manager, and we’ll give them the same written price we give you.

tankless water heater leaking repair

What we do

Leak diagnosis

We find the source (tank, valve, fitting, line or slab) before we quote anything.

Valve & fitting repair

Relief valves, drain valves, connectors, and fittings, usually fixed on the first visit.

Need a repair that isn’t a leak? See our water heater repair in Los Angeles.

Why Los Angeles chooses Advantage Plumbing & Rooter

We answer 24/7

Real people answer, day or night, weekends and holidays. Not a call center.

Written prices up front

You approve the price before we start. No surprises on the invoice.

Licensed, bonded & insured

CA License #1067555 (verify at cslb.ca.gov). Workers’ comp included.

Family-owned since 1997

27+ years of sewer and drain work. We compete with the national chains by doing it right.

Workmanship guarantee

We don’t leave until the job is done right, and we stand behind our work.

Same-day service

Request online, and we confirm your appointment within one hour.

How it works

01

Call or request online

We confirm your appointment within one hour.

02

We diagnose & quote

Our licensed team finds the source and gives you a written price.

03

We fix it, often same-day

Repair or replace, installed to code and guaranteed.

Water heater leak repair near you

We cover 30+ communities from our base in La Crescenta-Montrose, 24/7.

Rated 5.0 ★ across 300+ reviews

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Tiffany Hsieh profile picture
Tiffany Hsieh
3 November 2026
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Our water heater was leaking and we made an emergency call to Steve on a Sunday afternoon, and he quickly made an appointment first thing on Monday morning. Frank came out and was absolutely wonderful. He came and quickly diagnosed the issue, and was out of the door in less and 2 hours. He was also extremely sweet to our young toddler - even giving us a heads up when turning on the water vacuum to make sure that my little guy could find a quiet place to hide. Super professional, great work, and reasonable prices - we couldn't ask for anything more. Thank you!!
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Ryan Novi profile picture
Ryan Novi
31 October 2026
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Frank has been helping with our plumbing issues for years. He's personable, great with young kids, and most importantly, does excellent work in a timely manner. Can't recommend him enough.
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carly kirkman profile picture
carly kirkman
30 October 2026
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Great service and quick response time. Highly recommend.
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Cheng Wen profile picture
Cheng Wen
27 October 2026
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I have always turned to Frank for our plumbing need since moving to South Pas. He has again and again proven himself to be a reliable and professional plumber. Communication with the new headquarters is easy, he showed up early, worked his magic, and we now have a fully functional shower!
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Get Geoff profile picture
Get Geoff
27 October 2026
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If you only read one thing about this review, you should know that Steve follows up on calls/texts. Steve has always answered my calls (or texts), and arranged to provide service in a timely manner. This has not always been my experience with contractors. Steve stepped in when I had remedial foundation work going on at my house that required plumbing services. Previous home owners had made "penny-wise and pound-foolish" plumbing decisions that became apparent during the foundation rework. Steve's approach of taking pictures (and showing me live video) and explaining the circumstances made my decisions about plumbing service a near no-brainer. I also liked his sensible approach regarding materials vs long-term hassle: Maintainability, longevity, material cost, availability, resilience, etc. Steve is my go-to plumber. Update from 10/27/26: Needed a part replaced on my hot water heater. Frank from Advantage came to investigate it on the SAME DAY we called. He was friendly and helpful, telling us what needed to be fixed. Frank got the parts and repaired it quickly. It's still my go-to plumbing business!
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Cynthia Young profile picture
Cynthia Young
24 October 2026
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Steve Hutkins is fantastic—thorough, professional, and incredibly knowledgeable. He provided detailed estimates and excellent guidance, helping prepare our HOA for a major plumbing project. The company’s follow-up and clear instructions made the entire process much easier. Elizabeth in the office was equally wonderful. She was prompt, responsive, and ensured that our major drainage pipe replacement stayed on schedule and was completed as planned. The entire team was professional and completely transparent, keeping us informed and advising us every step of the way. Their communication, organization, and attention to detail were exceptional. I would absolutely work with this company again and highly recommend them to any HOA looking for a reliable, professional plumbing company!
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Diane Stokes profile picture
Diane Stokes
22 October 2026
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Frank got right to work unplugging a very stopped up drain pipe that serviced two condo units - mine and the one above me. He checked for outside clean-out valves and when the first tool he used to snake out the line couldn’t do the job he walked around the block to his truck to bring in a more powerful one. He explained everything he was about to do, answered all my questions and cleaned up a greasy mess afterwards. The price was reasonable. I would highly recommend Frank and Advantage Plumbing.
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Chris Blondal profile picture
Chris Blondal
21 October 2026
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Jose was great. He took his time and explained everything. Very polite and did a great job.
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Inge Seabo profile picture
Inge Seabo
17 October 2026
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Great job
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Richard Pepper profile picture
Richard Pepper
15 October 2026
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Amazing technicians, knowledgeable, incredible Office help
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Scott Hayashi profile picture
Scott Hayashi
13 October 2026
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Excellent service and reasonable rates
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Bill Tom profile picture
Bill Tom
8 October 2026
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Always professional. Thanks Albert and Warren.
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Alberto De Diego profile picture
Alberto De Diego
8 October 2026
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Frank with Advantage Plumbing is really excellent. He’s been out to our house in South Pasadena a few times. He’s always on time, can come on short notice when needed, and is super professional and capable. Always gets things fixed quickly at a fair and reasonable rate. He’s also a super nice guy. Always asks about our dog, for example, who’s been having medical issues lately! Class act.
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Angelo Incardona profile picture
Angelo Incardona
7 October 2026
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Frank (the plumber) did a great job installing our tankless water heater. It was a tough job under the blazing heat conditions.
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Michele Hamburger profile picture
Michele Hamburger
3 October 2026
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Simply the best. I was able to reach someone at 10pm on Friday night and they arrived at 6am Saturday and fixed my water heater in 30 min. Trustworthy and skilled, highly recommend
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Ann Kochakji profile picture
Ann Kochakji
3 October 2026
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We've hired Advantage Plumbers for three jobs so far and are very happy with their work. Their prices are reasonable and the plumbers go out of their way to make sure the job is done right. They make suggestions when needed which is helpful and even pick up parts when necessary. We would especially like to acknowledge Victor and his assistant for fixing the leak in our outdoor pipes.
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Mihran Asatourian profile picture
Mihran Asatourian
2 October 2026
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Great company. Called them for a leak under kitchen sink (cat stood on pipe and the weight separated the connections). They offered to send someone same-day, but I opted for next morning instead. I love that they use a one hour appointment window, instead of 3-5 hours like other companies. Technician, Victor, arrived right on time, explained the issue to me and pointed out a couple other problems, fixed everything and tested everything thoroughly before leaving. I told him about the cat and he made sure to "cat proof" the connections. Like I said, great company, don't hesitate to use them.
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Mark J profile picture
Mark J
1 October 2026
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Frank has done work at my properties for ages. He's always been congenial, forthright, and honest with me, even erring on the side of caution when necessary because he knows that doing a job right is the utmost importance.
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Abira Ali profile picture
Abira Ali
1 October 2026
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We had Advantage plumber Frank come over to flush our tankless hot water system. He was very efficient, friendly and got everything done and operating- no fuss- no muss- so nice to have hot water. Thanks Frank!
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Andrew Sanesi profile picture
Andrew Sanesi
30 September 2026
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Water heater leaking: FAQs

The water itself is mostly a damage risk. The danger signs are water coming from the relief valve (too much pressure or heat), a gas smell, or scorch marks near the burner. Shut off the water and gas or power and call us. If you smell gas, leave first and call SoCalGas from outside.

Yes, if the leak is at a valve, fitting, or connector. No, if the water is coming from the tank itself. A rusted-through tank has to be replaced.

Usually a loose or corroded fitting on the cold inlet or hot outlet, a worn flex connector, or the anode port. These are normally quick repairs.

The temperature-and-pressure relief valve opens when the tank gets too hot, or the pressure is too high, or when the valve itself is failing. Replacing the valve is easy. Finding out why it opened, such as high house pressure or a missing expansion tank, is the important part.

Turn off the water and gas or power to the unit and call us. Leaks at fittings and relief valves are repairable. A leaking heat exchanger often isn’t worth fixing, and we’ll tell you honestly which one you have.

For a single-family home in the City of Los Angeles, yes, unless the contractor is an LADBS Certified Licensed Contractor doing a like-for-like replacement. Other cities have their own rules. The permit is included in our written price.

Stop the Leak. Get Your Water Heater Back.

Licensed water heater leak repair and replacement across Los Angeles since 1997. Free estimate, confirmed within one hour.

Get A Free Estimate

CONFIRMED WITHIN ONE HOUR

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🔒No obligation. Confirmed within one hour. Never shared.