A running toilet wastes up to 200 gallons per day. A leaking wax ring lets sewer gas into your home. A rocking toilet damages your subfloor. STL Plumbing Pros diagnoses and repairs all toilet problems — running toilets, leaks, clogs, loose mounting, and failed components. When repair isn't cost-effective, we also handle toilet installation and replacement. Same-day service, parts on the truck.
Common Toilet Problems We Fix
Running toilet — flapper, fill valve, or overflow tube issues wasting water 24/7.
Toilet leaking at base — failed wax ring or cracked flange allowing water and sewer gas.
Weak or incomplete flush — clogged rim jets, low water level, or partial drain blockage.
Rocking or loose toilet — broken flange bolts or deteriorated flange needing repair.
Constantly clogging — may indicate a drain line issue beyond the toilet itself.
Our Process
Diagnose
We identify the specific component causing the problem — not just the symptom. Running toilet? We determine if it's the flapper, fill valve, or overflow.
Quote & Repair
Clear pricing before we start. Most toilet repairs are completed in under an hour with parts from our truck.
Test & Verify
We flush multiple times, check for leaks at every connection, and verify the toilet is secure and functioning properly.
What Does Toilet Repair Cost?
| Service | Price Range | Details |
|---|---|---|
| Flapper / Fill Valve Replacement | $100–$175 | Most common fix for running toilets |
| Wax Ring Replacement | $150–$250 | Includes reset and bolt replacement |
| Toilet Flange Repair | $200–$350 | New flange, wax ring, and secure mount |
| Handle / Flush Mechanism | $75–$150 | Replacement of internal flush components |
| Diagnostic Visit | $75–$100 | Applied toward repair if you proceed |
* Prices are estimates. We provide exact pricing after diagnosis. No hidden fees.
What Our Customers Say
"Toilet was running for weeks. New flapper and fill valve — $150 and done in 30 minutes. Water bill should drop significantly."
"Toilet was rocking and smelled like sewer. New wax ring and flange repair fixed everything. Professional work."
"Toilet kept clogging. Turned out to be a partial blockage in the drain line, not the toilet itself. Good diagnosis."