Toilet Repair
Old Fashioned Service with Modern Technology

Toilet Repair in Shreveport, LA
Fast, Reliable Toilet Repair from Licensed Plumbing Professionals
A malfunctioning toilet disrupts your entire household. Mark Johnson & Sons Plumbing provides same-day toilet repair and replacement throughout Shreveport, diagnosing the problem accurately and fixing it permanently so you are not calling again next month for the same issue. As part of our comprehensive plumbing services in Shreveport, we deliver professional results backed by decades of experience.
Why Toilet Repair Matters
Toilets account for roughly 30 percent of a home’s total water consumption. A running toilet can waste 200 gallons per day — water you are paying for but never using. In Shreveport, where water and sewer rates are billed together, a single faulty fill valve or flapper can add $50 or more to your monthly utility bill without you realizing why.
Beyond water waste, toilet problems create sanitation and structural concerns. A leaking wax ring allows sewer gas and moisture to seep beneath the toilet base, rotting the subfloor and creating conditions where mold thrives in Northern Louisiana’s humid environment. A wobbling toilet stresses the flange connection, which can crack the porcelain or break the drain fitting entirely.
Many homeowners attempt DIY toilet repairs with mixed results. Internal components like flush valves, fill valves, and flappers are straightforward, but issues involving the flange, wax seal, or drain connection require professional tools and expertise to prevent further damage.
Our Toilet Repair Services
Running Toilet Repair
A toilet that runs continuously or cycles on and off typically has a worn flapper, a misadjusted float, or a failing fill valve. We diagnose the specific component and replace it with commercial-grade parts that outlast hardware store alternatives.
Clog Removal
When a plunger is not enough, we use professional augers to clear obstructions deep in the trapway or branch drain. For recurring clogs, we inspect the drain line to identify root intrusions, scale buildup, or improper slope contributing to the problem.
Base Leak Repair
Water pooling around the base of a toilet usually indicates a failed wax ring or a cracked flange. We pull the toilet, inspect the flange condition, replace the seal, and reset the fixture with proper alignment and bolting.
Flange Repair & Replacement
A corroded or broken closet flange cannot hold the toilet securely to the floor. We repair flange rings, install flange repair plates, or replace the entire flange assembly depending on the extent of the damage and the existing drain pipe material.
Toilet Replacement & Installation
When repair costs approach the price of a new unit, or your toilet is simply outdated, we install modern water-efficient models. We handle removal of the old fixture, flange preparation, wax ring seating, supply connection, and caulking.
Fill Valve & Flush Valve Replacement
Internal tank components wear out over time. We replace fill valves, flush valves, handles, trip levers, and tank-to-bowl gaskets using quality parts compatible with your toilet brand and model.
Call us at 318-319-0220 today or click below to schedule service.
When to Call for Toilet Repair
- The toilet runs continuously or cycles every few minutes
- Water appears around the base of the toilet on the floor
- The toilet rocks or shifts when you sit down
- Flushing is weak or incomplete, requiring multiple flushes
- You hear gurgling sounds when the toilet drains
- A persistent sewer odor comes from the bathroom despite cleaning
- The handle is loose, sticks, or must be held down to complete a flush
- Cracks are visible in the porcelain tank or bowl
Why Choose Mark Johnson & Sons in Shreveport
- Accurate diagnosis first — we identify the actual cause before recommending repairs, so you do not pay for parts that were never the problem
- Same-day toilet repair — most repairs are completed in under an hour using parts we carry on every truck
- Flat-rate pricing — you approve the cost before work begins, no surprises on the invoice
- Licensed journeymen — every technician holds a Louisiana plumbing license and understands local code requirements for toilet installations
- Veteran-owned, family-run — honest assessments from a company that has served the region since 1997
- Clean, respectful service — we protect your floors, sanitize the work area, and leave your bathroom cleaner than we found it
Frequently Asked Questions
How do I know if my toilet needs repair or replacement?
If the porcelain is cracked, the toilet requires frequent repairs, or it uses more than 1.6 gallons per flush, replacement is usually the better investment. For single-component failures on a modern toilet, repair is more cost-effective.
Why does my toilet keep clogging?
Frequent clogs can result from a partial obstruction in the drain line, a first-generation low-flow toilet with insufficient flushing power, root intrusion in the sewer lateral, or items being flushed that should not be (wipes, feminine products, excessive paper).
How much water does a running toilet waste?
A toilet with a stuck flapper or faulty fill valve can waste 200 to 400 gallons per day, adding $30 to $70 or more per month to your Shreveport water and sewer bill.
Can you repair a cracked toilet tank?
Minor hairline cracks above the waterline can sometimes be sealed, but cracks below the waterline or structural cracks in the bowl require full replacement. A cracked tank also poses a risk of sudden failure and flooding.
What causes a toilet to rock back and forth?
Loose mounting bolts, a deteriorated wax ring that has compressed unevenly, a broken closet flange, or an uneven floor surface. We address the root cause — simply tightening bolts on a broken flange will lead to a leak.
How long does a toilet installation take?
A standard toilet replacement takes approximately one to two hours, including removing the old unit, inspecting and preparing the flange, setting the new toilet, and connecting the water supply.
Do you install bidets or bidet attachments?
Yes. We install standalone bidet fixtures, bidet toilet seats, and bolt-on bidet attachments. Supply line access and electrical proximity (for heated seats) vary by bathroom, so we assess before recommending a specific solution.
What toilet brands do you recommend?
We install all major brands. For durability and parts availability, we frequently recommend Kohler, American Standard, and TOTO. We can discuss features like elongated vs. round bowls, comfort height, and dual-flush options based on your preferences.
Is it normal for my toilet to sweat in the summer?
Condensation on toilet tanks is common in Shreveport’s humid summers when cold water fills the tank and warm, moist air contacts the exterior. Anti-sweat valves that mix warm water into the fill supply can eliminate this issue.
Should I use drop-in tank cleaners?
We generally advise against them. Many chemical drop-in tablets degrade rubber flappers and seals prematurely, causing the very leaks and running toilets they were meant to prevent. Regular cleaning with a bowl brush is safer for your toilet’s internal components.
Related Shreveport Services
- Backflow Testing & Certification in Shreveport
- Bathroom Plumbing in Shreveport
- Bathroom Remodeling in Shreveport
- Septic Tank Treatment in Shreveport
View all plumbing services in Shreveport or explore our full Shreveport service area.
Contact Us Today
A toilet problem is not something you can ignore. Whether yours is running, leaking, clogging, or simply due for replacement, Mark Johnson & Sons Plumbing resolves toilet issues quickly and correctly for Shreveport homeowners. Call 318-319-0220 to schedule your repair today.
See What Our Customers Have to Say About Us
Our Reviews

“We have been using Mark Johnson Plumbing for a number of years. We have always been pleased with the technicians and the services they perform.”
– James A.
“Hagen came & quickly assesses the situation after Atmos came out & cut the gas off. He was very professional & founds the two problems quickly! Luckily they were not pricey Issues at all. Then (Christopher) Chris Came back Out very quickly to cut the gas back on inside the house after Atmos did outside. Due to COVID they could not come in the house to turn the valves back on which we had NO idea where they were located. We felt SO stupid that we couldn’t handle that but Chris assured us that most wouldn’t!
He was so nice & professional!! I will definitely call Mark Johnson again. ”
– Marion W.
“I was able to get an appointment the next day.
Service was great, fast, friendly, and exactly what was agreed on. They were on time and did I mention friendly? I would recommend this company to anyone who needs quality plumbing work done. Ask for Quinn Wall.
The customer service was awesome from the start as well. Text notifications of who’s coming, when they will be there. Nice job!”
– Mark T.
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Doing It Right Since 1997

- Veteran Owned & Operated Business
- Multi-Generational Family Business
- Same Day Plumbing Services Available
- Upfront, Flat Rate Pricing Provided to You
- Available for Any Plumbing Emergencies
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