J & J Plumbing Service has been the go-to plumber for homeowners, landlords, property managers, and commercial clients throughout Monrovia and the wider San Gabriel Valley since 2000. Whether you need a leaky faucet fixed before the weekend or a plumber at your door today for an urgent situation, we pick up the phone and we get moving. Same-day appointments are available, and we respond to plumbing emergencies around the clock.
Family-owned. Locally rooted. Ready to plumb.
Call (626) 619-9789 for a quote.
A properly functioning plumbing system is easy to take for granted until something goes wrong. We handle the full range of residential and commercial plumbing repair and installation, from a single dripping faucet to a full repiping project. Drain cleaning, leak detection, water heater repair and replacement, sewer line service, fixture installation, garbage disposals, and more, all completed by licensed plumbers who know what they are doing and take pride in leaving the job done right.
We have been trusted by local homeowners and property managers for their plumbing for more than two decades. That kind of track record does not happen by accident. It comes from showing up on time, communicating clearly, and doing the work correctly the first time. Your pipes are in good hands with us.
The sooner you call, the sooner the water is back on, and that matters most when you are dealing with a plumbing emergency. A pipe that has let go, a water heater that has stopped working, a drain that has backed up completely, these situations cannot wait for a Monday morning appointment. We are available same-day, after hours, on weekends, and overnight for the calls that simply cannot be put off.
Common emergencies we handle include burst pipe repair, emergency water heater repair, emergency leak repair, sewer backup repair, and emergency drain cleaning. If something has gone wrong and water is going where it should not, call (626) 619-9789 and we will get a plumber headed your way.
Slow drains and full clogs show up in every part of a home or commercial property. Kitchen drains collect grease and food debris over time. Bathroom drains catch hair and soap buildup. Floor drains in laundry rooms and garages get overlooked until they back up. Main drains and sewer drains can become fully blocked, affecting the whole building at once.
We clear drains throughout the house using the right method for the job. For stubborn or recurring clogs that a standard snake will not reach, hydro jetting service blasts the line clean with high-pressure water, removing buildup that keeps coming back. One call brings a plumber to your door.
A properly plumbed home is a worry-free home, and nothing disrupts that faster than a leak you cannot see. Water can travel behind walls, under floors, and through concrete slab foundations before it ever makes itself visible. In Los Angeles County, where concrete slab construction is common, slab leaks are a real concern. A slow leak inside a slab can cause significant structural damage and drive water bills up before a homeowner even notices.
We locate hidden leaks using proven detection methods, then repair or replace the damaged section of pipe. Whether it is a water supply line, a pipe behind drywall, or a slab leak under the foundation, we find it and fix it. Clear communication from the first call to the final test means you always know what we found, what we are doing about it, and what to expect when the work is complete.
Tank and tankless water heaters both have a lifespan, and when they start failing, the signs are hard to miss. No hot water, a unit that leaks at the base, water that takes too long to heat up, or a tank that makes rumbling noises are all reasons to call. We repair tank water heaters and replace them when repair no longer makes sense. We also handle tankless water heater repair and replacement for homeowners who have already made the switch.
If you wake up to no hot water, that qualifies as an emergency. We offer same-day and after-hours water heater service throughout the Monrovia area. Reach out and we'll start at the source of the leak.
When the job is done, we leave your home clean and dry, and that applies to even the smaller jobs that still disrupt daily life. A running toilet wastes more water than most people realize. A toilet that will not flush properly is an immediate problem. A dripping kitchen or bathroom faucet adds up fast on a water bill. These are not minor inconveniences, they are plumbing problems worth fixing.
We handle toilet repair and replacement, faucet repair and installation in kitchens and bathrooms, sink installation, and full fixture replacement. We also install, repair, and replace garbage disposals. If a fixture in your home is not working the way it should, we can assess it and take care of it the same day in most cases.
The sewer line running from your home to the city connection is one of the most important pipes on the property, and one of the most overlooked until something goes wrong. A main line clog can back up every drain in the building at once. A cracked or deteriorating sewer line can cause slow backups, foul odors, and soggy patches in the yard.
We provide sewer line cleaning, repair, and replacement, along with main water line repair and replacement. Sewer line inspection helps identify the condition of the line before a small problem becomes a full replacement. If you are dealing with a sewer backup or recurring main line clogs, we can clear the line and give you an honest assessment of what comes next. Pick up the phone and we'll get moving.
If you're not sure your water pressure is where it should be, it is worth getting it checked. Low water pressure can point to a failing pressure-regulating valve, a partially closed shutoff valve, or corroded pipes that are restricting flow. We diagnose water pressure problems and fix them at the source, whether that means replacing a pressure-reducing valve, repairing a shutoff valve, or replacing the main shutoff entirely.
For homes with aging galvanized or polybutylene pipe that is past its useful life, whole-house repiping with copper or PEX is a long-term solution that restores reliable water flow and eliminates the risk of chronic leaks. We back every repiping project with a workmanship guarantee on every plumbing job, so you have confidence in the work long after we leave.
Southern California presents a specific combination of factors that shape what plumbing upgrades make sense here. Seismic activity, aging housing stock, drought conditions, and California's water conservation requirements all influence the work we do most often in this area. The three services below come up regularly in Monrovia and the surrounding communities for good reason.
Southern California's energy costs are among the highest in the state, and the mild year-round climate means a tankless water heater can deliver consistent savings without the strain that colder climates put on the system. A tankless unit heats water on demand rather than maintaining a full tank around the clock, which reduces energy use and frees up space. We install new tankless units and handle full conversions from traditional tank systems. On installation day, we handle the gas line connection, the venting, and the water line hookup, and we test the system before we leave.
California's ongoing drought conditions and mandatory water conservation standards make low-flow fixture upgrades both a practical choice and, in some cases, a code requirement. Replacing older faucets, showerheads, and toilets with WaterSense-compatible models reduces water use without sacrificing performance. We supply and install water-saving fixtures throughout the home, including kitchen and bathroom faucets, showerheads, and toilets. It is a straightforward upgrade that pays off on the water bill over time.
Los Angeles County sits on active fault lines, and seismic gas shutoff valves are a recognized safety measure for homes in the region. These valves are installed on the gas line and are designed to automatically shut off gas flow when they detect the ground movement associated with an earthquake, before a leak can ignite. We install seismic shutoff valves directly on the gas line serving the home. It is one of the more practical safety upgrades available to Southern California homeowners, and installation is straightforward for a licensed plumber.
Businesses, property managers, and multi-unit property owners have plumbing demands that go beyond what a typical residential service call covers. High-volume drain systems in restaurants, water heater setups for apartment buildings, and pipe repair in office buildings all require a plumber who understands commercial work. We handle commercial drain cleaning, commercial water heater installation and repair, pipe repair and replacement, and ongoing service for rental properties of all sizes.
Residential plumbing. Commercial plumbing. One number for both.
Property managers and landlords rely on us to respond quickly when a tenant calls with a plumbing problem. We keep communication clear so you know what was done and what it cost. Your pipes are in good hands with us.
Plumbing repair costs vary depending on what is involved, and we think every customer deserves to understand what they are paying for before work begins. When you call, we ask the right questions to give you a realistic estimate up front. There are no surprises at the end of the job.
Our work travels by word of mouth here, so we earn it every visit. That means honest pricing, clear explanations, and work done to a standard we are proud to put our name on. Call (626) 619-9789 to request an estimate and get a straight answer on what your plumbing job will cost.
Getting your plumbing problem handled starts with a quick call, and when you call us, you reach someone who knows Monrovia. We have been locally owned and operated here since 2000, and the families and businesses we serve in the San Gabriel Valley are our neighbors. All work is performed by licensed plumbers who take the job seriously and treat your property with care.
We serve Monrovia and the surrounding communities throughout Los Angeles County, including Arcadia, Duarte, Azusa, Temple City, El Monte, San Gabriel, Sierra Madre, and Bradbury. If you are nearby and need a plumber, we can likely be there the same day. Trusted by local homeowners and property managers for their plumbing for more than two decades, we have built this business one job at a time.
Our primary service area is Monrovia, and we work throughout the surrounding San Gabriel Valley communities in Los Angeles County. We regularly serve Arcadia, Duarte, Azusa, Bradbury, Temple City, El Monte, San Gabriel, Sierra Madre, and Glendora. If you are nearby and unsure whether we cover your address, call (626) 619-9789 and we will let you know right away.
Same-day appointments are available for most calls, and we respond to plumbing emergencies around the clock. When you call, we ask a few quick questions about the situation and get a plumber scheduled as soon as possible. For urgent situations, we prioritize getting someone to your door the same day.
Turn off the main water shutoff valve to stop the flow, then call us at (626) 619-9789 immediately. If the water is near any electrical panels or outlets, keep clear of those areas until the power is off. We are available for emergency plumbing response around the clock and will get a plumber moving toward your address as quickly as possible.
When you call, we talk through what is happening so we arrive with the right tools and parts. The plumber inspects the problem, explains what is causing it, and gives you a clear picture of the repair and what it will cost before any work begins. Once you approve the scope, we complete the work, test everything, and leave the space clean.
We give you a clear estimate before work begins, and we stick to it. If something unexpected comes up during the job that changes the scope, we stop and explain it to you before proceeding. You will not see surprise charges at the end of a visit.
The more detail you can share about the problem, the better. Useful information includes where the problem is located, how long it has been happening, whether there is visible water damage, and whether you have already tried any fixes. We ask the right questions when you call so we can give you a realistic estimate up front.
Clear a path to the problem area so the plumber can get to work without delay. If the issue involves an under-sink area, water heater, or main shutoff, move any stored items out of the way ahead of time. Knowing where your main water shutoff is located is also helpful in case it needs to be turned off quickly.
When every drain backs up simultaneously, the problem is almost always in the main sewer line rather than an individual fixture drain. Stop using water in the home to avoid worsening the backup, and call us right away. We will clear the main line and assess whether there is a deeper issue such as a damaged or root-invaded pipe.
A drain that clogs repeatedly usually has an underlying cause that a basic snake does not address. Grease buildup, scale, root intrusion, or a damaged section of pipe can all cause recurring blockages. We use hydro jetting and camera inspection to find the root cause and clear it properly so the problem stops coming back.
J & J Plumbing Service is ready to take your call today. Whether you have an emergency that needs immediate attention or a repair you have been putting off, we are available same-day and after hours throughout Monrovia and the surrounding area.
Family-owned. Locally rooted. Ready to plumb.
Call (626) 619-9789 for a quote. One call brings a plumber to your door.
We handle the full range of residential and commercial plumbing work throughout Monrovia and the San Gabriel Valley, from a dripping faucet to a full sewer line replacement. The table below breaks down what each service covers, who it fits best, and a practical note to help you decide what to do next. If you have questions after looking it over, a quick call gets you a straight answer and a realistic estimate.
| Plumbing Service | What the Job Covers | Typical Situations | Helpful to Know |
|---|---|---|---|
| Leak Detection and Repair | hidden pipe and wall leak locationslab leak detection and repairwater supply line repair | anyone with rising water bills, water stains, or unexplained moisture | Concrete slab construction is common in Los Angeles County, making slab leaks a real concern; early detection limits structural damage. |
| Earthquake Gas Shutoff Valves | seismic shutoff valve installation on the gas lineautomatic shut-off on ground movement detection | Los Angeles County homeowners on active fault lines who want a recognized safety measure in place | Installation is straightforward for a licensed plumber and adds a layer of protection before a leak can ignite after seismic activity. |
| Sewer and Main Line Service | sewer line cleaning and repairmain water line repair and replacementsewer line camera inspection | properties with multiple drains backing up, foul odors, or soggy patches in the yard | A camera inspection shows the condition of the line and helps you understand whether cleaning or replacement is the right next step. |
| Water-Saving Fixture Upgrades | low-flow faucet and showerhead installationWaterSense-compatible toilet replacementwhole-home fixture assessment | homeowners responding to California conservation requirements or looking to reduce water bills | Some water-saving upgrades are required under California code; we install fixtures that meet current standards. |
| Tankless Water Heater Installation | new tankless unit installationfull conversion from tank systemsgas line and water line hookup | homeowners looking to cut energy costs and free up space | Southern California energy rates make tankless units a practical long-term investment; we test the system fully before we leave. |
| Emergency Plumbing | burst pipe responseemergency water heater repairafter-hours sewer backup and leak service | any situation where water is going where it should not and cannot wait until morning | We are available same-day, after hours, on weekends, and overnight; call as soon as the problem starts to limit damage. |
| Garbage Disposal Service | disposal repairfull disposal replacementinstallation on new sinks | kitchens with a disposal that hums, jams, leaks, or will not turn on | Most disposal issues are resolved in a single visit; replacement units are installed and tested the same day in most cases. |
| Drain Cleaning and Clog Removal | kitchen and bathroom drain clearingmain drain and sewer drain cleaninghydro jetting for stubborn buildup | homeowners or tenants with slow or fully blocked drains | Recurring clogs often signal a deeper issue; hydro jetting clears buildup that a standard snake leaves behind. |
| Water Heater Repair and Replacement | tank water heater repair and replacementtankless unit repairsame-day and emergency service | homeowners with no hot water, a leaking unit, or a water heater past its useful life | Most tank water heaters last 8 to 12 years; a unit making rumbling noises or leaking at the base is usually a replacement candidate. |
| Toilet Repair and Installation | running toilet repairflush mechanism replacementfull toilet replacement and installation | any household dealing with a toilet that runs, leaks, or will not flush properly | A running toilet can waste hundreds of gallons a month; repair is usually straightforward and often same-day. |
| Faucet and Fixture Installation | kitchen and bathroom faucet repair and replacementsink installationshowerhead replacement | homeowners upgrading fixtures or dealing with drips and leaks at the tap | Replacing an older faucet with a WaterSense model is a simple upgrade that adds up on the water bill over time. |
| Whole-Home Repiping | galvanized and polybutylene pipe replacementcopper and PEX repipingfull system testing after completion | older homes with corroded, failing, or chronically leaking pipe throughout | A full repipe eliminates the cycle of repeated leak repairs and restores reliable water flow; we back the work with a workmanship guarantee. |
| Water Pressure and Shutoff Valve Repair | pressure-regulating valve replacementshutoff valve repair and replacementwhole-house water pressure diagnosis | homeowners with noticeably low or uneven water pressure throughout the house | A failing pressure-reducing valve is a common cause of low pressure and is a straightforward repair when caught early. |
How do I know if my water heater needs to be replaced rather than repaired?
Age is the first thing to look at. Most tank water heaters have a useful life of 8 to 12 years. If the unit is in that range or beyond it and is showing signs of trouble, such as water pooling at the base, a rumbling or popping sound from the tank, or water that takes much longer than usual to heat, replacement is often the more practical choice. We assess the unit when we arrive and give you an honest read on whether repair makes sense or whether a new unit will serve you better long-term.
What causes a drain to keep clogging even after it has been cleared?
A drain that clogs repeatedly usually has something going on beyond a simple blockage. Grease and soap buildup can coat the inside of a pipe over time and keep narrowing the opening. Tree root intrusion is a common cause in older sewer lines. A damaged or misaligned section of pipe can also trap debris and cause recurring backups. Hydro jetting clears the line more thoroughly than a standard snake, and a camera inspection lets us see whether there is a structural issue that needs to be addressed.
What is the difference between a tank and a tankless water heater?
A tank water heater stores a set volume of hot water and keeps it heated continuously. A tankless unit heats water on demand as it flows through the system, which means no standby heat loss and no running out of hot water during a long shower. Tankless units generally cost more upfront but tend to use less energy over time. In Southern California, where energy costs are on the higher side and the mild climate puts less seasonal strain on the system, a tankless unit is a practical option for many households. We can walk you through both when you call.
Same-Day and Emergency Availability
We take calls around the clock and offer same-day appointments for most plumbing situations. When the problem cannot wait, we prioritize getting a plumber to your door the same day.
How do you find a leak that is not visible from the surface?
Hidden leaks behind walls, under floors, or beneath a concrete slab require detection methods that go beyond a visual inspection. We use pressure testing, acoustic listening equipment, and other proven techniques to narrow down where the leak is before opening anything up. In Monrovia and the surrounding area, slab leaks are a real concern given how common concrete slab construction is here. Finding the leak accurately first means less disruption to your home and a more targeted repair.
What are the signs of a sewer or main line problem?
The most obvious sign is multiple drains backing up at the same time. If your kitchen sink, bathtub, and toilet are all slow or backing up simultaneously, the problem is almost certainly in the main line rather than an individual fixture. Other signs include gurgling sounds from drains when water is running elsewhere in the house, persistent foul odors near floor drains, and soft or unusually green patches of grass in the yard above where the sewer line runs. Any of those symptoms is worth a call.
Can you give me a price estimate before the plumber arrives?
We ask the right questions when you call so we can give you a realistic range before anyone shows up. The more detail you can share, such as where the problem is, how long it has been happening, and whether there is visible water damage, the more accurate that estimate will be. Once the plumber arrives and inspects the situation, we give you a clear price before any work begins. If something unexpected comes up during the job that changes the scope, we stop and explain it before proceeding.
Upfront Quotes With No Surprise Fees
We give you a clear price before any work begins and stick to it. If the scope changes during the job, we explain it to you before we proceed.
Do I need to be home when the plumber comes?
For most work, yes. The plumber needs access to the problem area, and we go over the findings and the estimate with you before starting. For rental properties, we work regularly with landlords and property managers who coordinate access through a tenant or a building contact. If you are managing a property remotely, call us and we will figure out the right arrangement for your situation.
What should I do immediately if a pipe bursts or water starts flooding?
Turn off the main water shutoff valve right away to stop the flow. If water is near an electrical panel, outlets, or appliances, stay clear of those areas until the power is off. Then call us. We are available around the clock for plumbing emergencies and will get a licensed plumber moving toward your address as quickly as possible. The faster the water is shut off, the less damage there is to deal with afterward.
Workmanship We Stand Behind
We back our work with a workmanship guarantee on every plumbing job, so you have confidence in the repair long after we have left your home.
What is hydro jetting and when does it make sense over a standard snake?
Hydro jetting uses high-pressure water to scour the inside of a drain or sewer line, removing grease, scale, and other buildup that a mechanical snake pushes through but does not fully clear. It makes the most sense when a drain keeps clogging despite repeated snaking, when a line has significant grease accumulation from a kitchen or restaurant, or when a sewer line has minor root intrusion that needs to be flushed out. We use the right method for the situation rather than defaulting to one approach.
How long does a whole-home repipe take?
The timeline depends on the size of the home and the scope of the work, but most whole-home repiping projects are completed in one to three days. We work through the house systematically, restore water service at the end of each day when possible, and test the full system before we consider the job done. We back every repiping project with a workmanship guarantee, so you have confidence in the work well after we have left the property.
Why would I install an earthquake gas shutoff valve?
Los Angeles County sits on active fault lines, and a seismic gas shutoff valve is designed to automatically cut off gas flow when it detects ground movement consistent with an earthquake, before a disrupted gas line can ignite. The valve is installed directly on the gas line serving the home and requires no manual action to work. It is one of the more practical safety upgrades available to homeowners in this region, and installation is a straightforward job for a licensed plumber.
Call (626) 619-9789 and we will talk through your situation, give you a straight estimate, and get a plumber scheduled for the time that works best for you.
(626) 619-9789