Running Toilet Repair
Diagnosis and repair for toilets that continue running, cycle on and off, or refill even when they have not been used.
Toilet Repair and Replacement in San Antonio, TX
A running, leaking, clogged, or poorly flushing toilet can waste water, damage flooring, and disrupt one of the most frequently used rooms in your home. Lujan Plumbing provides professional toilet repair, replacement, and installation for homeowners throughout San Antonio and the surrounding area.
Whether the problem involves a worn tank component, a leak at the base, a stubborn clog, or an aging toilet that no longer performs reliably, we can inspect the fixture and explain whether repair or replacement is the better long-term option.
Toilet Leak Repair
Identification of leaks from the tank, supply line, shutoff valve, base, mounting hardware, or internal components.
Clogged Toilet Service
Help with persistent or recurring toilet clogs that do not clear with basic household plunging.
Flush and Refill Repair
Repair for weak flushes, incomplete flushes, slow tank refill, double flushing, and other operating problems.
Toilet Replacement
Removal of an old, cracked, inefficient, or unreliable toilet and installation of a properly fitting replacement.
New Toilet Installation
Professional toilet installation for bathroom updates, replacements, remodels, and other compatible applications.
Signs Your Toilet Needs Attention
Some toilet problems are obvious, while others develop slowly and waste water without creating an immediate mess. Contact a plumber if you notice any of the following:
- The toilet continues running after the tank has refilled
- The toilet turns on by itself between uses
- Water collects around the base
- The tank or bowl is cracked
- The toilet rocks or moves when used
- The flush is weak or incomplete
- The bowl fills too high or drains too slowly
- The tank takes an unusually long time to refill
- The toilet clogs repeatedly
- The shutoff valve or supply line is leaking
- You hear dripping or hissing inside the tank
A toilet that appears to have a minor problem may still waste a large amount of water over time. Leaks at the base can also damage flooring and the material beneath the toilet if they are not corrected.
Honest Recommendations
Should You Repair or Replace Your Toilet?
Many toilet problems can be repaired by replacing a worn flapper, fill valve, flush valve, seal, supply line, handle, or another individual component.
Replacement may be the more practical choice when the porcelain is cracked, the toilet clogs repeatedly, repairs have become frequent, or the fixture no longer performs well enough for the household.
Lujan Plumbing will inspect the toilet and surrounding plumbing, explain the source of the problem, and help you compare repair and replacement without recommending unnecessary work.
Common Toilet Problems
Worn Flapper
A flapper that no longer seals correctly can allow water to leak from the tank into the bowl and cause frequent refilling.
Failed Fill Valve
A worn or misadjusted fill valve may cause slow filling, continuous running, noise, or an incorrect tank water level.
Flush Valve Problems
A damaged flush valve or seal can interfere with flushing and allow water to leak internally.
Clogged Trap or Drain
Excess paper, foreign objects, buildup, or downstream drain problems may cause repeated clogs or slow emptying.
Failed Base Seal
A damaged wax ring or other toilet seal may allow water or odor to escape around the base.
Loose Mounting or Damaged Flange
A toilet may rock or shift when the mounting hardware, flange, flooring, or surrounding support is damaged.
Why Does My Toilet Keep Running?
A running toilet usually means water is continuously moving from the tank into the bowl or the tank is not shutting off correctly after it refills.
- A worn or misaligned flapper
- An incorrectly adjusted chain
- A damaged fill valve
- A tank water level set too high
- A leaking flush-valve seal
- A cracked or damaged overflow tube
- Mineral buildup affecting internal components
Because the water often flows directly into the bowl, a running toilet may not leave visible water on the floor. The first warning sign may be the sound of refilling or an increase in water usage.
Why Is My Toilet Leaking Around the Base?
Water around the base of a toilet can come from several sources. It may be caused by a failed toilet seal, loose mounting, condensation, a leaking supply connection, or water traveling down from the tank.
The source should be identified before replacing the wax ring or tightening the toilet. Overtightening porcelain can crack the fixture, and a damaged flange or unstable floor may require more than a new seal.
- Stop using the toilet if water appears after each flush
- Dry the area to help identify where the water returns
- Check for visible moisture at the tank and supply line
- Avoid repeatedly tightening the toilet bolts
- Have the seal, flange, and surrounding area inspected
Recurring Toilet Clogs
An occasional clog may result from too much paper or waste, but a toilet that clogs repeatedly may have a fixture, drain, or plumbing problem that needs further inspection.
Foreign Object in the Trap
A small object lodged inside the toilet can restrict flow and cause repeated clogs.
Weak Flush Performance
Low tank water, blocked rim jets, worn components, or an older design may not move waste effectively.
Drain-Line Restriction
A clog farther downstream may affect the toilet and potentially other nearby plumbing fixtures.
Vent or System Problem
In some cases, a broader drainage or venting issue can contribute to poor toilet performance.
Incorrect Toilet Selection
A toilet with poor performance or an unsuitable design may be more prone to clogging in a particular household.
Older Drain Conditions
Buildup, damaged piping, or an existing drain problem may make recurring clogs more likely.
Choosing a Replacement Toilet
A replacement toilet should fit the bathroom, existing plumbing, and the needs of the people who use it. Appearance matters, but dimensions and compatibility should be confirmed before the fixture is purchased.
- Rough-in measurement: The distance from the finished wall to the center of the drain bolts must match the toilet.
- Bowl shape: Round and elongated bowls require different amounts of floor space.
- Seat height: Standard-height and comfort-height models may suit different users and accessibility needs.
- Flush performance: A toilet should provide dependable waste removal without requiring repeated flushing.
- Water use: Modern toilets are designed to use less water than many older fixtures while maintaining acceptable performance.
- Installation space: Door swing, cabinets, walls, supply valves, and nearby fixtures can affect what will fit.
You may purchase your own replacement toilet, but confirming the rough-in, bowl dimensions, supply location, and available space before ordering can help avoid installation problems.
What to Expect During Toilet Service
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1
Tell Us What Is Happening
Describe the leak, clog, running sound, loose fixture, or flush problem you have noticed.
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2
We Inspect the Toilet
We examine the fixture, tank components, supply connection, base, and relevant drainage conditions.
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3
You Receive a Clear Recommendation
We explain whether repair, drain service, resealing, or replacement is the more practical option.
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4
We Complete and Test the Work
After service or installation, we flush and inspect the toilet for proper operation, stability, and leaks.
What Is Included in a Toilet Replacement?
A toilet replacement involves more than placing a new fixture over the existing drain. The installation area and connection points should be checked so the new toilet sits securely and operates correctly.
- Shutting off and disconnecting the existing toilet
- Removing the old fixture from the installation area
- Inspecting the flange and visible mounting area
- Installing an appropriate new toilet seal
- Setting and securing the replacement toilet
- Connecting the water supply
- Adjusting the tank components when needed
- Testing for leaks, stability, filling, and flushing
Additional work may be needed when the flange, flooring, shutoff valve, supply line, or drain connection is damaged.
Why San Antonio Homeowners Choose Lujan Plumbing
Toilet problems can involve the fixture, internal tank components, water supply, floor connection, or drainage system. A careful inspection helps ensure the correct part of the plumbing is repaired.
- More than 30 years of plumbing experience: Your toilet is serviced by an experienced Master Plumber.
- Local and family-owned: You receive personal service from a San Antonio plumbing business, not a national franchise.
- Repair-first recommendations: When a dependable repair is practical, we will explain that option.
- Complete fixture evaluation: We inspect the toilet and relevant supply, seal, flange, and drainage conditions.
- Respect for your home: We work carefully in the bathroom and leave the service area clean.
- Clear communication: We explain the problem and recommended solution before completing the work.
Frequently Asked Questions About Toilet Repair and Replacement
Why does my toilet keep running?
A running toilet is commonly caused by a worn flapper, failed fill valve, incorrect chain adjustment, high tank water level, or a leaking flush-valve seal.
Can a running toilet increase my water bill?
Yes. Because water may continuously move from the tank into the bowl, a running toilet can waste water even when there is no visible leak on the floor.
Why is my toilet leaking around the base?
The leak may come from a failed base seal, loose toilet, damaged flange, cracked porcelain, tank connection, supply line, or condensation. The source should be confirmed before repair.
Can a toilet with a cracked tank or bowl be repaired?
Cracked porcelain generally requires replacement because the crack can worsen and release water unexpectedly. Stop using the toilet if the crack is actively leaking.
Why does my toilet clog repeatedly?
Recurring clogs may be caused by a foreign object, weak flush, older toilet design, buildup, or a restriction farther into the drain system.
Why does my toilet rock when I sit on it?
A rocking toilet may have loose mounting hardware, an uneven floor, a damaged flange, deteriorated support, or an installation problem. Continued movement can damage the base seal.
Should I repair or replace an older toilet?
Repair may make sense when the porcelain is sound and the problem involves a replaceable component. Replacement may be better when the toilet is cracked, frequently clogs, performs poorly, or requires repeated repairs.
Can I purchase my own replacement toilet?
In many cases, yes. Confirm the rough-in measurement, bowl size, height, supply location, and available bathroom space before purchasing the fixture.
What should never be flushed down a toilet?
Only human waste and toilet paper should normally be flushed. Avoid wipes, paper towels, hygiene products, diapers, grease, cat litter, and other materials that can clog the fixture or drain system.
Do you serve areas outside San Antonio?
Lujan Plumbing serves San Antonio and nearby communities. Contact us to confirm service availability for your address.
Request Plumbing Service
Need Help With a Broken, Leaking, or Clogged Toilet?
Contact Lujan Plumbing for professional toilet repair, replacement, and installation in San Antonio. We will inspect the fixture, explain the problem, and recommend a practical solution for your bathroom.