A properly plumbed home is a worry-free home, and J & J Plumbing Service has been helping Monrovia homeowners and business owners reach that standard since 2000. Twenty-six years of showing up, doing the work right, and standing behind it. Family-owned. Locally rooted. Ready to plumb.
We serve both residential and commercial clients across Monrovia and the surrounding Los Angeles County communities. Whether you need a leaking pipe repaired before it damages your floors or you manage a multi-unit property that needs a plumber who can handle volume and variety, we are the team that picks up the phone and gets there. Work performed by licensed plumbers on every job. One call brings a plumber to your door.
When the business started in 2000, it was two people, a truck, and a commitment to doing honest plumbing work in the community they called home. The founders grew up in the San Gabriel Valley and knew Monrovia the way you only learn a place by living there. Word spread through neighborhoods, from one homeowner to a neighbor, from a landlord to a property manager down the street. That is still how most of our calls come in today. Our work travels by word of mouth here, so we earn it every visit.
The team has grown, but the approach has not changed. Licensed plumbers perform all the work. We do not hand jobs off to unfamiliar crews or subcontract out the work that matters most to you. Our clients include longtime Monrovia homeowners, residential landlords, property management companies, and small businesses throughout Los Angeles County. Each one gets the same level of care: clear communication from the first call to the final test, and a plumber who treats your property with respect. Your pipes are in good hands with us.
Getting your plumbing problem handled starts with a quick call. We work across property types and job sizes, from a single dripping faucet in a Monrovia bungalow to a full sewer line replacement at a commercial building. Residential plumbing. Commercial plumbing. One number for both.
Same-day service is available for most calls. When a plumbing problem cannot wait, we make it a priority to get someone to your door quickly. Emergency response is available around the clock, so a burst pipe or a sudden loss of hot water does not have to turn into a long, stressful wait. Pick up the phone and we'll get moving.
The calls we get most often are the ones that disrupt daily life: a slow drain in the kitchen, a bathroom drain that backs up every few days, a faucet that drips through the night. We handle all of it.
Drain cleaning and clog removal covers everything from a simple kitchen drain snake to hydro jetting for stubborn or recurring blockages in older pipes. Hydro jetting uses pressurized water to clear grease, scale, and debris that a standard snake cannot reach, and it is often the right answer for lines that keep backing up.
Leak detection and repair is another high-frequency service. A pipe leak that goes unnoticed can cause significant water damage before anyone sees the signs. We locate the source, explain what we found, and repair it cleanly.
Faucet repair and replacement, fixture installation, sink repair, toilet repair and installation, and garbage disposal service round out the everyday work. Whether a running toilet is wasting water on your monthly bill or a garbage disposal has stopped responding, we can diagnose and fix it in a single visit. These are the jobs that keep a home or commercial property functioning, and we take them seriously even when the fix looks routine.
When the job is done, we leave your home clean and dry, and that standard applies to water heater work as much as any other service. A water heater that stops producing hot water is an immediate disruption. We respond quickly, diagnose the problem, and give you a clear picture of whether repair or replacement makes more sense before any work begins.
We service and replace traditional tank water heaters and install tankless systems for homeowners looking for on-demand hot water and longer equipment life. Tankless water heater installation has become a common upgrade in the area, particularly in homes where the existing tank is aging out and the homeowner wants to avoid replacing it again in another ten years. Licensed plumbers handle all water heater work, including the gas line connections that the job requires. A workmanship guarantee on every plumbing job means you can call us back if something is not right. Reach out and we'll start at the source of the leak.
Some plumbing problems go deeper than a fixture or a drain. Sewer line issues, aging pipe systems, and whole-house water pressure problems require a different level of diagnostic work, and we are equipped to handle them.
Sewer line service includes cleaning, repair, replacement, and camera inspection. A video pipe inspection lets us see exactly what is happening inside the line before we recommend a repair approach. Sewer backups, main line clogs, and root intrusion are all jobs we handle regularly in the San Gabriel Valley.
Repiping is the right answer when a home's pipe system has aged past the point of reliable repair. We replace galvanized pipe, install copper and PEX pipe systems, and handle full whole-house repipes for older Monrovia properties where the original plumbing is causing repeated problems.
Water pressure diagnostics, shutoff valve repair and replacement, backflow preventer installation, and water main repair round out the larger-scope work we perform. Gas line repair and installation is also available, performed by licensed plumbers who understand the code requirements that apply in Los Angeles County.
Southern California's housing stock and geology create plumbing challenges that are specific to this region. We have spent 26 years working on the homes and buildings that make up Monrovia and the surrounding valley, and that experience shapes how we approach the work.
Monrovia and much of the San Gabriel Valley were built out in the postwar decades, with a large share of homes constructed on concrete slab foundations. The copper pipes running beneath those slabs have been under pressure for fifty or sixty years, exposed to hard water mineral buildup and the occasional movement that comes with seismic activity in the region. Slab leaks are a predictable result of those conditions, and they are more common here than in parts of the country built on crawlspaces or basements.
A slab leak visit starts with electronic detection to locate the source without unnecessary demolition. Once we identify the leak, we walk you through the repair options and what each one involves. Catching a slab leak early limits the damage to your foundation and flooring significantly.
Established Monrovia neighborhoods have water mains and supply lines that have been in the ground for decades. Galvanized pipe, in particular, corrodes from the inside over time, reducing water pressure and eventually failing. We handle water main repair and replacement, water line repair, and main drain cleaning for properties where the original infrastructure is showing its age. For homes where galvanized pipe is the underlying issue, we often pair water line work with a conversation about whole-house repiping so the homeowner is not dealing with the same problem in sections over the next several years.
The sooner you call, the sooner the water is back on, and that is exactly why we keep emergency availability around the clock. A burst pipe, a sewer backup, or a sudden loss of hot water does not follow a business-hours schedule, and neither do we.
We handle plumbing emergencies across Monrovia and the surrounding area: burst pipe repair, major leak control, sewer backup response, and no-hot-water calls that cannot wait until morning. When you call, a local person answers and gets a plumber moving toward your address. Same-day service is available for non-emergency calls as well, because most plumbing problems get worse the longer they sit.
Pricing questions are fair questions, and we answer them straight. Before any work begins, we explain what the job involves and what it will cost. If something comes up during the work that changes the scope, we tell you before we proceed, not after.
There are no surprise charges at the end of a visit. Call for a quote and we will give you a clear number based on what we find. Affordable plumbing service does not mean cutting corners on materials or skipping steps. It means charging a fair price for work done correctly by licensed plumbers who know what they are doing.
If you're not sure your water pressure is where it should be, or you have a plumbing concern of any size, we are close by. Our primary service area is Monrovia, and we work throughout Los Angeles County communities in the San Gabriel Valley and beyond.
Nearby areas we serve regularly include Arcadia, Duarte, Azusa, Glendora, Temple City, Sierra Madre, and El Monte. If you are in any of these communities and need a local plumber, we are the same team that serves your neighbors in Monrovia. Trusted by local homeowners and property managers for their plumbing across the valley and throughout the area.
We have been locally owned and operating in Monrovia since 2000, which puts us at more than 26 years of plumbing work in this community. The business started with a commitment to honest work and has grown through word of mouth across the San Gabriel Valley. That history means we know the housing stock, the neighborhoods, and the plumbing challenges that come up most often in this area.
When you call us, you reach a local person who knows Monrovia and can speak directly to your situation. We are locally owned and personally accountable for every job we take on. You are not navigating a menu or waiting for a callback from someone unfamiliar with the area.
We are available every day from 5:30 AM to 10:30 PM, and we respond to plumbing emergencies throughout those hours. Burst pipes, major leaks, and sudden loss of hot water are exactly the situations we prioritize. Call (626) 619-9789 and we will get a plumber moving toward your address as quickly as possible.
We communicate clearly from the first call through the final test. Before work begins, we explain what we found and what the repair involves. If anything changes during the job, we stop and talk to you before proceeding, so you are never left wondering what is happening or what it will cost.
Monrovia has a significant number of homes built in the postwar decades, and we have been working on them for more than 26 years. We know what to expect from aging galvanized pipe, older fixture configurations, and concrete slab foundations common in this part of Los Angeles County. That familiarity helps us diagnose problems faster and recommend repairs that hold up long term.
We treat your property with care throughout the job, from laying down protective coverings where needed to cleaning up the work area when we are done. When the job is finished, we leave the space clean and dry. We do not consider a job complete until the area looks the way it did when we arrived, or better.
Twenty-six years. Locally owned. Residential and commercial plumbing handled by licensed plumbers who know this area and stand behind their work. J & J Plumbing Service is ready to help with everything from a clogged drain to a full repipe, and every job in between.
Call (626) 619-9789 to request an estimate or schedule service. We will give you a clear answer on timing, pricing, and what to expect before we start. Family-owned. Locally rooted. Ready to plumb.
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