Repair makes sense when
The toilet runs but the china is fine, the faucet drips but the body and finish are good, parts are still made, and the fixture already meets California's flow limits.
Costa Mesa plumbing service
Toilet, faucet and disposal repair in Costa Mesa
A running toilet or a dripping faucet wastes water you pay for on every Mesa Water or IRWD bill. We repair and replace toilets, faucets, garbage disposals and fixtures in Costa Mesa houses, condos and apartments, with new fixtures that meet California's water-conserving rules.
Call (657) 669-4766Request service
Written and fact-checked by John, editor, MBA in marketing
Updated against City, utility and state sources
Quick answer
Most running toilets need a new flapper or fill valve, and most dripping faucets need a cartridge or washer. To check a toilet, put a few drops of food coloring in the tank and wait 10 minutes; color in the bowl means a leak, per the EPA. New toilets in California are limited to 1.28 gallons per flush. Call (657) 669-4766.
- Toilet dye test
- 10 minutes (EPA)
- New toilets
- 1.28 gallons per flush max
- One drip a second
- More than 3,000 gallons a year (EPA)
Toilet repair: running, leaking, clogged and wobbling toilets
Most toilet problems come from a few parts: the flapper, the fill valve, the wax ring and the supply line, and most are repairs, not replacements.
| Symptom | Likely cause | Usually |
|---|---|---|
| Runs on and off by itself | Worn flapper letting water seep into the bowl | Replace flapper |
| Runs constantly, water in the overflow tube | Fill valve set too high or failing | Adjust or replace fill valve |
| Slow or weak flush | Mineral buildup in rim holes, low tank level, partial clog | Clean, adjust or clear |
| Water on the floor at the base | Failed wax ring, loose bolts, cracked bowl | Reset with new ring, or replace |
| Drip from the supply line or valve | Old supply line or worn angle stop | Replace line and stop |
| Rocks when you sit | Loose closet bolts or a damaged flange | Tighten, repair flange |
| Clogs often | Wipes, older low-performing bowl, a problem in the main line | Clear, then check the line |
| Hairline crack in the tank or bowl | Impact or age | Replace |
A toilet that clogs over and over, or gurgles when the washer drains, may not be a toilet problem at all. In Costa Mesa's 1960s and 1970s slab homes, the line under the floor and the clay lateral to the street are often the real cause. Our drain cleaning page covers main line clogs, and sewer camera inspection shows what is going on below the slab. If sewage is coming up in a tub, treat it as an emergency.
The EPA toilet dye test for silent leaks
Put a few drops of food coloring in the toilet tank, wait 10 minutes without flushing, and if color shows in the bowl, the toilet is leaking.
Take the tank lid off
Set it somewhere flat and soft. Tank lids are heavy and crack easily on tile.
Add food coloring to the tank water
A few drops is enough. Dark blue or green shows up best.
Wait 10 minutes without flushing
Make sure no one uses that toilet during the test.
Check the bowl
Any color in the bowl means water is leaking from the tank, almost always past the flapper.
Flush right away
The EPA says to flush after the test so the coloring does not stain the tank.
The U.S. EPA's WaterSense program says household leaks can waste more than 9,300 gallons a year in an average home, and about 9% of homes have leaks wasting 50 gallons or more a day. For a whole-house check, read the water meter, use no water for two hours, and read it again. If it moved, you probably have a leak. If the toilets pass the dye test and the meter still moves, the leak may be in a wall or under the slab. That is a job for leak detection.
Mesa Water bills in units of 748 gallons, and its 2026 rate is $6.38 per unit. A leak that wastes thousands of gallons a year adds several billing units, which is why a five minute dye test is worth doing a couple of times a year.
Faucet repair: drips, low flow and leaks under the sink
A dripping faucet usually needs a new cartridge, washer or seat; low flow is usually a clogged aerator; and water under the sink is usually a supply line or drain connection.
The EPA says a faucet dripping once per second can waste more than 3,000 gallons a year. Most modern single-handle faucets use a cartridge, and replacing it stops the drip. Older two-handle faucets in original 1960s and 1970s kitchens and baths often use rubber washers and brass seats that wear. When the faucet body itself is corroded or parts are no longer made, replacement makes more sense.
Low flow and spitting faucets
Mesa Water's 2025 groundwater averaged about 6.6 grains per gallon of hardness, with readings from about 1.2 to 17 grains, according to its 2026 Consumer Confidence Report. That is moderate on average, but mineral scale still collects in aerator screens and cartridges over time. Unscrew the aerator, soak it in vinegar and rinse it. If flow is low at every fixture, the problem is bigger, and our repiping page covers older supply lines. Our water hardness guide has the full numbers.
Leaks under the sink
- Supply lines: braided lines and older plastic lines fail with age. Replace both when one goes.
- Angle stops: the small shutoff valves under the sink often seize or weep in older homes. Replacing them while the faucet is out is cheap insurance.
- P-trap and drain joints: slip nuts loosen, and old metal traps rust through.
- Faucet base: water running down the deck and under the sink points to a worn base gasket or a cracked body.
Garbage disposal repair and replacement
A disposal that hums but will not turn is usually jammed, one that is silent has usually tripped its reset, and one that leaks from the body usually needs replacing.
Turn it off at the switch and unplug it if you can
Never put a hand in a disposal. Use tongs to remove anything you can see.
Free the jam from below
Most disposals have a hex socket in the center of the bottom. Turn it back and forth with the hex key that came with the unit until it moves freely.
Press the reset button
A small button on the bottom pops out when the motor overheats. Press it, restore power and run cold water before switching on.
Check for leaks
Water at the top flange, the dishwasher hose connection or the drain elbow can often be fixed. Water from the body of the unit means it has failed.
Grease is the disposal's biggest enemy and the sewer's too. The Costa Mesa Sanitary District serves about 118,000 residents, and a May 2, 2025 spill of about 4,000 gallons at East Mesa Verde Dr and Golf Course Dr was traced to tree roots and cooking grease. Wipe greasy pans into the trash, and keep fibrous peels, coffee grounds and bones out of the disposal. Run cold water while the disposal is on and for a few seconds after, so the ground waste is carried down the line instead of settling in the trap.
California water-conserving fixture rules
California requires older, high-flow toilets, showerheads and faucets to be replaced with water-conserving fixtures, and new fixtures must meet CALGreen's flow limits, starting with 1.28 gallons per flush for toilets.
What counts as noncompliant
California Civil Code section 1101.3 defines a noncompliant plumbing fixture as a toilet made to use more than 1.6 gallons per flush, a urinal made to use more than one gallon per flush, a showerhead with a flow capacity of more than 2.5 gallons per minute, or an interior faucet that emits more than 2.2 gallons per minute.
| Property type | Deadline | Also triggered by | At sale |
|---|---|---|---|
| Single-family home | Owner to replace by January 1, 2017 | Building alterations or improvements: replace before final permit approval | Seller discloses in writing the requirement and whether noncompliant fixtures remain |
| Multifamily and commercial | Replace by January 1, 2019 | Additions over 10% floor area, alterations above the statute's construction cost threshold, or any permitted room alteration (that room's fixtures) | Seller discloses in writing from January 1, 2019 |
| Fixture | Maximum | CALGreen section |
|---|---|---|
| Toilet (water closet) | 1.28 gallons per flush, effective flush volume | 4.303.1.1 |
| Showerhead | 1.8 gpm at 80 psi (from July 1, 2018) | 4.303.1.3.1 |
| Multiple showerheads on one valve | 1.8 gpm combined at 80 psi, or only one outlet operating at a time | 4.303.1.3.2 |
| Bathroom (lavatory) faucet | 1.2 gpm at 60 psi | 4.303.1.4.1 |
| Kitchen faucet | 1.8 gpm at 60 psi; may temporarily boost to 2.2 gpm but must default to 1.8 | 4.303.1.4.4 |
Costa Mesa's housing is old enough that this still matters. The City's 2021 Housing Element shows about 73% of homes were built before 1980, so original high-flush toilets and old showerheads still turn up. When we replace a fixture, the new one meets the current limits. When you remodel a bathroom under a permit, the City's final can depend on replacing any noncompliant fixtures. Our permits guide covers when a permit is needed.
Tenant and landlord fixture issues
In California, the landlord generally keeps plumbing fixtures working, the tenant must use them properly, and in multifamily buildings the tenant must report a water-conserving fixture that is not working as rated.
About six in ten Costa Mesa households rent, based on the City's 2023 figure of 40.3% owner-occupied homes. Fixture problems are among the most common rental repair requests, and the law gives each side a role.
| Issue | Usually | Why |
|---|---|---|
| Toilet or faucet wears out from normal use | Landlord | Civil Code 1941.1 requires plumbing in good working order |
| No hot water | Landlord | A rental must have a water supply capable of hot and cold running water (1941.1) |
| Toilet clogged by wipes, toys or misuse | Often the tenant | Civil Code 1941.2 requires tenants to use plumbing fixtures properly |
| Fixture not working at its rated water use (multifamily) | Tenant reports, landlord corrects | Civil Code 1101.5(c) |
| Landlord needs to enter to repair a fixture | Written notice, 24 hours presumed reasonable | Civil Code 1954; no notice needed in an emergency |
If you rent, report fixture problems in writing with a photo. A running toilet left for months wastes water and, in a building where the owner pays the water bill, costs the owner money too. If you own or manage rentals, our landlord and property manager page explains how we schedule with tenants and report back. This is general information, not legal advice.
Fixture shutoff valves and what to do before we arrive
Every toilet and sink should have its own small shutoff valve, called an angle stop, and closing it stops a fixture leak without shutting off the whole house.
Look behind the toilet near the floor, and inside the cabinet under each sink. You should see a small valve with an oval or round handle on each supply line. Turn it clockwise to close. In many original 1960s and 1970s Costa Mesa homes, these valves have not been turned in decades. They can be stiff, and some start to drip at the stem once moved. If a valve will not turn by hand, do not force it with pliers. Close the main shutoff instead, which our emergency plumber page shows how to find.
Before a fixture visit, it helps to:
- Clear the cabinet under the sink so the plumber can reach the valves and drain
- Note when the problem started and whether it is constant or on and off
- Run the EPA dye test on any toilet you suspect is leaking
- If you rent, let your landlord or manager know the visit is scheduled
- Have the new fixture on site if you bought your own, with its box and instructions
When we replace a faucet or toilet in an older home, we usually recommend replacing the angle stops and supply lines at the same time. It is a small add while everything is apart, and it means the next leak can be stopped with a quick turn.
Repair or replace a toilet or faucet?
Repair when the fixture body is sound and parts are available; replace when it is cracked, corroded, noncompliant or keeps failing.
Replacement makes sense when
The bowl or tank is cracked, the faucet body is corroded, the toilet is an old high-flush model above 1.6 gallons, parts are discontinued, or you have paid for the same repair twice.
Replacing an old toilet usually means a new wax ring, closet bolts, supply line and often a new angle stop. Replacing a faucet usually means new supply lines and stops. In older homes we check the flange and the drain under the sink too, because a new fixture on an old, failing connection does not last.
Toilet, faucet and disposal cost ranges
Published ranges are below; they are estimates, not quotes. Call (657) 669-4766 for an exact quote.
| Job | Published range | Source |
|---|---|---|
| Typical plumbing job, Costa Mesa | $117 to $391 | This Old House |
| Toilet installation | $224 to $533 | HomeAdvisor, 2025 |
| Faucet replacement | $161 to $364 | HomeAdvisor, 2022 |
| Garbage disposal installation | $150 to $950 | This Old House, 2026 |
| Single drain clog | $147 to $345 | HomeAdvisor, 2025 |
The fixture you choose moves the price most. Access, a seized angle stop, a broken flange or a rotted cabinet floor add to it. You get a written price before work starts. Call (657) 669-4766 for an exact quote, and see more ranges in our plumbing costs guide.
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Questions Costa Mesa homeowners ask
Why does my toilet keep running?
Usually a worn flapper or a fill valve set too high. If water is spilling into the overflow tube, adjust or replace the fill valve. If the toilet refills on its own every so often, the flapper is leaking. The EPA dye test confirms it in 10 minutes.
How do I check if my toilet is leaking?
Use the EPA dye test. Put a few drops of food coloring in the tank, wait 10 minutes without flushing, and look at the bowl. Any color means a leak, usually the flapper. Flush right after so the coloring does not stain the tank.
How much water does a dripping faucet waste?
The EPA says a faucet dripping once per second can waste more than 3,000 gallons a year. Mesa Water bills in units of 748 gallons, so a steady drip adds up to several billing units a year. Most drips are fixed with a new cartridge or washer.
What is the maximum flush for a new toilet in California?
1.28 gallons per flush. CALGreen limits new residential toilets to an effective flush volume of 1.28 gallons. Civil Code 1101.3 treats any toilet made to use more than 1.6 gallons per flush as noncompliant.
Do I have to replace old toilets when I sell my house in California?
California required single-family owners to replace noncompliant fixtures by January 1, 2017, and sellers must disclose in writing the requirement and whether noncompliant fixtures remain. Multifamily and commercial owners had until January 1, 2019. Ask your agent about your transaction.
Is my landlord responsible for fixing a leaking faucet?
Usually yes, when it wears out from normal use. California Civil Code 1941.1 requires rental plumbing to be in good working order. Tenants must use fixtures properly under 1941.2, so damage from misuse can be handled differently. Report it in writing.
Why is my garbage disposal humming but not working?
It is usually jammed. Turn it off, then use the hex key in the socket on the bottom to turn the blades free. Press the red reset button, run cold water and try again. If it still hums or leaks from the body, it likely needs replacing.
How much does it cost to replace a toilet in Costa Mesa?
HomeAdvisor publishes $224 to $533 for toilet installation, based on 2025 data. The toilet model, flange condition and a new supply valve affect the final price. That is a published range, not a quote. Call (657) 669-4766 for an exact quote.
Sources
Facts on this page come from these public sources, checked November 1, 2026.
- U.S. EPA WaterSense, Fix a Leak Week
- California Civil Code 1101.3
- California Civil Code 1101.4
- California Civil Code 1101.5
- California HCD, CALGreen residential mandatory measures (water closets, showerheads, faucets)
- LADWP, state and city plumbing codes (fixture flow rates)
- California Civil Code 1941.1
- California Civil Code 1941.2
- California Civil Code 1954
- Mesa Water District 2026 Consumer Confidence Report (2025 data)
- Costa Mesa Sanitary District profile
- New University, May 2025 Costa Mesa sewage spill
- City of Costa Mesa Housing Element, April 2021
- City of Costa Mesa 2023 economic profile
- This Old House, Costa Mesa plumbing costs
- HomeAdvisor, toilet installation cost
- HomeAdvisor, faucet installation cost
- This Old House, garbage disposal installation cost
- HomeAdvisor, drain cleaning cost