Skip to main content

How to fix a running toilet

how to fix a running toilet eating man
Image used with permission by copyright holder

Hey, is your toilet running? Well, you better go catch it! Ha, that’s some old-fashioned toilet humor for you, readers. Anyway, seriously, is your toilet running? Okay, let’s fix that. After all, a running toilet is not just irritating, it also eats into your water bill. 

First, take off the lid to your toilet’s tank, that way you can see what’s the matter. All toilets are pretty much the same on the inside. There might be a few minor differences, but those are all cosmetic. When you open the tank and peer inside, you’ll see that the handle controls a lever, which is attached to a chain or lift rod, which in turn is connected to a rubber flapper at the bottom of the tank. When you push down on the handle, the lever lifts, which pulls up the flapper. That’s how water gets from the tank to the bowl. Below is a handy diagram that shows you how your toilet works. 

shutterstock_159591218

Usually the cause of your toilet running woes will be found with the flapper. If it’s not fully closed, the tank will not fill up again, so reach in and close the flapper by pressing down on it. This should do the trick: the tank will fill up and your toilet will sit still.

Sometimes this won’t do the trick, though. If it doesn’t, your toilet might have waterline issues. If water is not filling up to the tank’s waterline, then check the water valve (located behind the tank) to see if it’s turned all the way on. If it isn’t, do so. Water should start filling up to the waterline. Now, if that doesn’t work, fiddle with the float and the fill valve. These two apparatuses work together: As the water level in the tank drops, the float descends as well, and when it’s completely descended, this lets the fill valve know that it’s time to release more water into the tank. The float ascends with the water level, and once the waterline is reached, the float tells the fill valve to stop pumping water. Adjusting the position of the float should stop your running toilet in its tracks.

If all of the above fails to fix your running toilet, then you’ve got a truly tenacious toilet and you should just smash it with a sledgehammer and buy a new one, or maybe seek professional assistance.

Editors' Recommendations

Jacob O'Gara
Former Digital Trends Contributor
Jacob O’Gara is an editorial assistant at Digital Trends, where he writes about everything from video games to…
How to use Live View on Blink cameras
Blink Mini camera on table.

When it comes to video doorbells and security cameras, few companies are as well-known as Blink. Often carrying premium features and affordable price tags, products in its catalog are an easy recommendation for most smart homes. One of the best features of Blink products is the Live View option, which lets you peek in at a live feed of your property.

Read more
The best smart blinds for 2023
Tilt My Smart Roller Shades

Smart blinds are the unsung heroes of the smart home. Having motorized shades that raise and lower with voice commands or on a set schedule is one of the best ways to create the illusion of someone being home, even if you're away. Smart blinds also are an effective way to save on your energy bill: Let in more light, keep the heat turned down, and let the sun save you some dough. Conversely, you can save on air conditioning costs by closing the blinds on hot days. Between convenience and energy savings, they're an accessory worth exploring – and we've rounded up the best smart blinds you can buy today right here.

Read more
How to turn off Eco Mode on the Nest Thermostat
The Google Nest Learning Thermostat in stainless steel.

Nest Thermostats use Eco Mode as a way to cut down on your energy usage. When set to this mode, your thermostat will automatically change the temperature in your home based on whether or not someone is home – and it’s a big selling point of the smart home gadget.

Read more