A running toilet isn’t just a minor annoyance—it can waste hundreds of gallons of water a day and significantly increase your water bill. The constant sound of running water usually means something inside the tank isn’t working the way it should. At Roto-Rooter, our expert plumbers handle these issues daily, and in most cases, the solution is fast and affordable. Below, we’ll break down the most common causes of a running toilet and how you can fix them.
Common Reasons Your Toilet Keeps Running
1. Worn-Out Flapper
The flapper is a rubber seal that lifts when you flush and drops back down to stop the flow of water. Over time, it can warp or degrade, preventing a proper seal and allowing water to leak into the bowl continuously.
How to fix it:
Turn off the water supply, flush the toilet to empty the tank, and inspect the flapper. If it’s worn or not sealing properly, replace it. New flappers are inexpensive and available at most hardware stores. If you’re unsure what type you need, a licensed plumber in Fresno can help you choose and install the correct part.
2. Improper Chain Length
The chain that connects the flapper to the flush handle can cause problems if it’s too tight or too loose. A short chain can keep the flapper from sealing, while a long one can get caught underneath it.
How to fix it:
Adjust the chain so it has about half an inch of slack. If necessary, trim excess links. This simple fix often resolves running toilet issues.
3. High Water Level or Overflow Tube Issues
The overflow tube directs excess water into the bowl to prevent flooding. If the water level in the tank is set too high, it will constantly drain into this tube.
How to fix it:
Check the water level—it should sit about an inch below the top of the overflow tube. Adjust the float on your fill valve to lower the water level. If you’re not sure how to make this adjustment, a plumber in Sacramento can help fine-tune your system for optimal performance.
4. Faulty Fill Valve
The fill valve refills the tank after each flush. When it malfunctions, it may allow water to keep flowing, even after the tank is full.
How to fix it:
If adjusting the float doesn’t work, you may need to replace the fill valve. Shut off the water supply, flush the tank, and install a new valve according to the instructions. If you’re uncomfortable doing this yourself, a plumber in Bakersfield can quickly diagnose and replace faulty components.
When to Call a Professional
While many toilet repairs are straightforward, others require a professional touch. If you’ve tried the above fixes and the toilet is still running, or if you notice mineral buildup and corrosion inside the tank, it’s time to call in an expert.
Roto-Rooter plumbers are equipped to handle all types of toilet issues, from simple adjustments to full replacements. We offer same-day appointments and transparent pricing, so you’re never left guessing.
Stop the Water Waste
A running toilet can waste thousands of gallons of water a year, driving up your utility bills and harming the environment. Fixing it now saves money and prevents further damage to your plumbing system.
Need help fast? Contact Roto-Rooter today to schedule service with a licensed plumber near you. Whether you’re in Fresno, Sacramento, Bakersfield, or beyond—we’re here to help.