J & J Plumbing Service has been the go-to local plumber for Monrovia homeowners and businesses since 2000. For more than 26 years, we have delivered full-service residential and commercial plumbing repair and installation across Monrovia and the wider Los Angeles County area. Whether you need a quick fixture swap or a full plumbing overhaul, we send licensed plumbers to handle the job right the first time. Family-owned. Locally rooted. Ready to plumb. One call brings a plumber to your door.
A properly plumbed home is a worry-free home, and the same holds true for any commercial property. We handle the full range of everyday plumbing work for homeowners, landlords, property managers, and business owners throughout the area. That means clogged drain service, pipe leak repair, fixture installation, water line repair, and code-compliant plumbing from the first fitting to the final inspection. Trusted by local homeowners and property managers for their plumbing, we show up prepared and we finish the work cleanly.
For commercial clients, including apartment building owners, office managers, and retail operators, we bring the same hands-on approach we use in residential homes. Water heater repair and replacement, sewer and main line service, garbage disposal installation, shutoff valve work, and repiping are all part of what we do. We understand that a plumbing problem in a rental unit or a commercial kitchen cannot wait, and we schedule accordingly.
We also help homeowners and property managers who are planning ahead rather than reacting to a crisis. Fixture upgrades, pressure-regulating valve installation, and hot-water recirculation pumps are the kinds of improvements that pay off over time. Whatever the scope, we treat every job with the same care. Your pipes are in good hands with us.
A slow or stopped drain is more than a nuisance. Left alone, a partial clog can back up into sinks, tubs, or floors and cause real damage. We clear clogged drains in kitchens, bathrooms, laundry rooms, and floor drains using the right tools for the job. For stubborn main line clogs, we bring in hydro jetting equipment that scours the inside of the pipe rather than just pushing the blockage further down. When we leave, the line flows freely and you know exactly what we found.
Water leak repair starts with finding the source, and that is not always obvious. We use leak detection methods that locate problems in walls, under slabs, and underground without tearing up your property unnecessarily. Slab leak repair and underground water line repair require careful work, and we take the time to do it correctly. Whether it is a broken pipe repair under a concrete floor or a water line repair in a crawl space, we explain what we found and what it takes to fix it before we start. Reach out and we'll start at the source of the leak.
No hot water is one of the most disruptive plumbing problems a household or business can face. We service both tank and tankless water heaters, diagnosing the issue before recommending a path forward. Sometimes a repair is the right call. Other times, an aging unit has reached the point where a water heater replacement makes more financial sense. We walk you through the options without pressure so you can make the right decision for your home or property. Pick up the phone and we'll get moving.
A running toilet wastes a surprising amount of water and adds up fast on a water bill. We handle running toilet repair, toilet replacement, leaking faucet repair, and full bathroom and kitchen fixture installation. For rental property owners, we keep fixture work efficient so units stay in service. For homeowners, we help you choose fixtures that fit the space and install them so they last. The work is practical, the results are clean, and we leave the space the way we found it.
A sewer backup is an emergency, and we treat it that way. We clear main sewer line clogs, repair damaged sewer lines, and replace sections of pipe that have collapsed or deteriorated. For qualifying jobs, trenchless sewer repair methods let us restore the line with minimal disruption to your yard or driveway. We work on the line that runs from your home to the city connection, keeping your drainage flowing and your property protected. We do not touch the tank or the drain field on the other end; our work stops at the line itself.
A jammed or leaking garbage disposal is a quick fix when you call the right plumber. We repair, install, and replace disposals in kitchens of all sizes. Low water pressure is a different kind of problem, one that often points to a partially closed valve, a failing pressure-regulating valve, or buildup in the supply line. We diagnose the cause and fix it at the source. Shutoff valve repair and replacement, including the main water shutoff, rounds out this category of smaller but important plumbing work that keeps a property running smoothly.
When a home or building has aging galvanized or deteriorating pipes, ongoing repairs start to cost more than a full repipe. We offer whole-house repiping and targeted pipe replacement service for properties where the plumbing system itself has become the problem. A pipe inspection helps us assess the condition of the existing lines and give you an honest picture of what makes sense. A repipe plumber from our team walks you through the scope, the timeline, and what to expect during and after the work.
Southern California's mild climate, seismic activity, and some of the state's strongest water-conservation mandates make certain plumbing upgrades especially relevant here. The three services below come up regularly in Monrovia and the surrounding communities, and we handle all three with the local knowledge that comes from more than two decades of work in this area.
Tankless water heaters are a natural fit for a region with year-round hot-water demand and no need to heat a large tank through the night against freezing temperatures. A tankless unit heats water on demand, which reduces energy use and frees up space in a utility closet or garage. We handle the full installation process, from assessing the gas line or electrical supply to mounting the unit and testing the output. We also service existing tankless systems when performance drops or error codes appear. Tankless water heater installation is one of the more common upgrades we complete in this area, and the results speak for themselves.
California's water-conservation standards are among the strictest in the country, and Monrovia residents feel that pressure year after year. Upgrading to low-flow toilets, water-efficient faucets, and high-performance showerheads is one of the most practical ways to reduce consumption without sacrificing comfort. We handle faucet replacement, bathroom and kitchen fixture installation, and full fixture upgrades for homeowners and rental properties alike. The fixtures we install meet current California efficiency standards, and the installation is clean and code-compliant.
An automatic seismic shutoff valve installs directly on the gas line and closes the moment it detects the motion of an earthquake. If a quake damages a gas line inside or near your home, the valve cuts the flow before gas can accumulate. It is a straightforward installation on the gas line itself, and it is one of the most sensible safety upgrades available to property owners in an earthquake-prone region like Los Angeles County. We handle the installation and make sure the valve is correctly positioned and tested before we leave.
The sooner you call, the sooner the water is back on, and that is exactly the mindset we bring to every emergency plumbing call. A burst pipe, a major leak behind a wall, or a complete loss of hot water cannot wait until next week. We are available for same-day plumbing service and urgent plumbing repair throughout Monrovia and the surrounding communities. Clear communication from the first call to the final test is how we operate, so you always know what is happening and what comes next.
Residential plumbing. Commercial plumbing. One number for both. Whether the emergency is in a single-family home or a multi-unit building, we respond with the tools and the experience to stop the damage and restore service. Reach out and we will get a licensed plumber to your door as quickly as possible.
We are based in Monrovia and we work throughout the communities that surround it. Our service area includes Arcadia, Duarte, Azusa, Bradbury, Temple City, and El Monte, along with other neighborhoods across the San Gabriel Valley. Our work travels by word of mouth here, so we earn it every visit. We back every job with a workmanship guarantee on every plumbing job, because the work we do today needs to hold up for the long term. Pick up the phone and we'll get moving.
We back every plumbing job with a workmanship guarantee, which means if something we repaired or installed does not hold up the way it should, we come back and make it right. The guarantee applies to the labor and installation work we perform. Call us at (626) 619-9789 if you have a concern after a job is complete and we will address it promptly.
We start with electronic detection equipment to locate the leak without unnecessary demolition. In most cases, we can pinpoint the source precisely enough to limit the access point to a small area rather than opening up a large section of floor. Once we locate the leak, we walk you through the repair options before any concrete or flooring is touched.
Common signs include no hot water or water that takes much longer than usual to heat up, rumbling or popping sounds from the tank, rust-colored water at the hot water taps, and visible water pooling around the base of the unit. An aging tank that is past its expected lifespan is also worth having evaluated even before obvious symptoms appear. We diagnose the issue and tell you honestly whether repair or replacement makes more sense.
Yes, seismic gas shutoff valve installation is a service we offer for homeowners throughout the Monrovia area and Los Angeles County. The valve installs directly on the gas line and automatically shuts off gas flow when it detects the ground motion of an earthquake. It is a straightforward installation performed by licensed plumbers, and we test the valve before we leave.
A tankless water heater installation includes assessing the existing gas line or electrical supply to confirm it can support the new unit, mounting the unit, connecting the gas line and water lines, and setting up the venting if required. We test the output before we leave to make sure hot water is flowing correctly and the unit is operating as expected. We also handle full conversions from traditional tank systems for homeowners making the switch.
Low water pressure can result from a partially closed shutoff valve, a failing pressure-regulating valve, scale or mineral buildup inside older pipes, or a problem with the water main itself. In Monrovia and the surrounding area, homes with aging galvanized pipe often experience pressure loss as the pipe corrodes from the inside and restricts flow over time. We diagnose the cause and fix it at the source rather than guessing.
We run a small camera through the sewer line to get a live view of the interior condition of the pipe. This lets us see exactly where a blockage is located, whether there is root intrusion, and whether the pipe itself is cracked, collapsed, or deteriorating. The inspection helps us recommend the right repair approach rather than working blind.
Roots seek out moisture and can work their way into small cracks or joint gaps in a sewer line over time. Once inside, they grow and eventually cause a partial or complete blockage. We clear root intrusion using hydro jetting and then assess the condition of the pipe to determine whether a repair or replacement is needed to prevent the problem from returning.
Hydro jetting is the right tool when a standard drain snake is not clearing the blockage, when a drain keeps clogging after repeated clearing, or when grease and scale have built up along the interior walls of the pipe. It uses high-pressure water to scour the line clean rather than just pushing the clog further along. It is especially effective for main lines and kitchen drain lines in commercial properties.
We use electronic leak detection methods that identify changes in moisture and pressure without requiring us to open up large sections of your home. Once we have a precise location, we can make a targeted access point to reach the pipe. This approach limits the disruption to your walls, floors, and finishes compared to exploratory demolition.
J & J Plumbing Service is ready to take your call for residential and commercial plumbing repair, installation, and emergency service throughout Monrovia and Los Angeles County. Getting your plumbing problem handled starts with a quick call. We will talk through the issue, give you a clear picture of what the work involves, and get a plumber scheduled. Call us at (626) 619-9789 for a quote. Family-owned. Locally rooted. Ready to plumb. Your pipes are in good hands with us.
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