A constantly running toilet isn’t just annoying—it can waste hundreds of gallons of water per day and spike your water bill. The good news? You can often fix it yourself with a few simple steps.
Here’s a quick FAQ to help you troubleshoot like a pro (or know when to call one).
💧 Why Is My Toilet Running Nonstop?
A running toilet is typically caused by one of three common issues:
- Flapper isn’t sealing properly
- Float is set too high or stuck
- Fill valve is broken or misadjusted
Let’s walk through each one and how to fix it.
🛠️ Step-by-Step: How to Fix a Running Toilet
1. Check the Flapper
The flapper is the rubber seal at the bottom of your tank.
- What to do:
- Remove the tank lid.
- Flush and watch the flapper.
- If it doesn’t seal properly, water will keep leaking into the bowl.
- Fix it:
- Wiggle the chain to make sure it isn’t too short or tangled.
- Replace the flapper if it looks warped, cracked, or old (under $10 at any hardware store).
2. Adjust the Float
The float controls the water level inside the tank.
- What to do:
- If water rises too high, it will drain into the overflow tube.
- Fix it:
- For older ball-float arms, gently bend the rod downward.
- For newer vertical floats, pinch the clip and slide the float down.
Tip: Ideal water level is about 1 inch below the top of the overflow tube.
3. Inspect the Fill Valve
If your toilet still runs after adjusting the float, the fill valve might be the problem.
- What to do:
- Turn off the water supply.
- Unscrew and inspect the fill valve.
- Fix it:
- Clean or replace the valve if it’s clogged or worn.
- Consider upgrading to a quiet-fill valve for better efficiency.
🚿 Is It Dangerous If My Toilet Keeps Running?
It’s not usually a health hazard, but it can waste up to 200 gallons per day and lead to:
- Skyrocketing water bills 💸
- Water damage if the tank overflows
- Mold or mildew in rare cases of prolonged overflow
🧰 What Tools Do I Need?
Just a few basics:
- Adjustable wrench
- Replacement parts (flapper, float, or fill valve kit)
- Towel or sponge for cleanup
Most fixes take under 15 minutes and cost less than $20.
📞 When Should I Call a Plumber?
Call a pro if:
- The issue keeps coming back after DIY fixes
- Your shutoff valve is leaking
- You hear gurgling or bubbling from other drains (could indicate a bigger issue)
Running toilets are usually easy to fix—but recurring problems might signal deeper issues in your home’s plumbing or water pressure system.
✅ Quick Checklist Before You Call
✔ Tank lid removed
✔ Flapper checked and reseated
✔ Float adjusted
✔ Fill valve inspected
✔ Water level tested
Still running? Time to call a licensed plumber.
💡 Bonus Tip: Prevent Future Toilet Troubles
- Avoid using bleach tablets inside your tank—they can degrade rubber parts.
- Check your toilet annually for wear and tear.
- Upgrade to a water-saving toilet for long-term savings.
🚨 Need Emergency Help in LA?
If your toilet won’t stop running and water is flooding your floor, shut off the water supply valve behind the toilet immediately and call a 24/7 plumber.