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How to Fix a Running Toilet?

Is your toilet running? Do you have a constant or intermittently running toilet? Let's troubleshoot this and get your running toilet fixed! Check out our guide to fix a running toilet!

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Step 1

Check out the video to learn how to fix your running toilet.

Step 2

Video didn't help? Check out the step-by-step instructions below.

Step 3

You can always give our customer service team a call too...We are here and happy to help! Simply call: 1-800-528-3553 - we are available Monday through Friday, 7:30 AM to 5:00 PM CST. 

How to Clean & Service a Korky QuietFill Toilet Fill Valve

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Constant or Intermittently Running Toilet

36,585 September 29, 2015

How to Replace a Korky® Toilet Flapper

11,299 April 19, 2017
How to Clean & Service a Korky QuietFill Toilet Fill Valve
Constant or Intermittently Running Toilet
How to Replace a Korky® Toilet Flapper

STEP 1: More times than not, your flapper is the cause to your running toilet. As the flapper slowly leaks, it causes the fill valve to do it's job and that's why you hear your fill valve running. Test if your flapper is leaking by marking the water level of your tank with a pencil.

STEP 2: Turn your water supply off. Wait for a minimum of 25 minutes. If your water level drops below the pencil mark, you have a leak in your tank.

STEP 3: Leave the water off for a couple hours and see where the water level drops to. If the water level drops to the flapper, your flapper is leaking and needs to be replaced. If it drops to a point on your overflow tube or your tank drained completely, your flush valve needs to be replaced.

STEP 4: If your tank is not leaking, but your toilet is constantly running or water is rising into flush valve overflow tube, your fill valve is malfunctioning and needs to be replaced or serviced. Did you know Korky replace old technology too?

STEP 5: If this didn't solve your running toilet issue, maybe it's time to service your fill valve. This is a quick disassemble of the fill valve, without removing it from your toilet and cleaning it out to ensure it works properly. Check out how: here.