Toilet Keeps Running? Repair or Replace It Today

A running toilet might not seem like a big deal, but it can waste hundreds of gallons of water each day and drive your water bill through the roof. The good news is that in most cases, toilet repair is simple and affordable. Whether it’s a leaky flapper, a faulty fill valve, or a float set too high, you can often handle the toilet keeps running issue yourself in under an hour. 

At That Plumber, we help homeowners fix stubborn toilet problems every day. Here’s a step-by-step guide to stop a running toilet, save money, and know when it’s time to repair or move forward with a toilet replacement. Need a hand fixing that running toilet? Use our online form to request service, and our team will take care of it fast. 

Step 1: Check the Fill Tube

Lift the tank lid and look for a small flexible tube that connects the fill valve to the overflow tube. This tube sends water into the bowl during a refill. If it’s disconnected or aimed the wrong way, the bowl won’t fill properly, leading to a weak flush or continuous running. 
To fix the fill tube, reattach the tube so it sits about one inch above the overflow tube and points directly into it. Flush to make sure water flows correctly.

Step 2: Adjust the Float

Your toilet’s float controls how much water fills the tank. If the float is set too high, water spills into the overflow tube and keeps the toilet running. Too low, and you’ll get a weak flush.

Fix:  

1. Find the fill line inside your tank, usually marked on the back wall.  
2. Adjust the float so the water level stops right at that line.

On older toilets, you may need to bend the brass float arm. On newer models, turn the adjustment screw or slide the clip up or down.

Step 3: Replace the Fill Valve

If adjusting the float doesn’t help, your fill valve may be defective. 

Fix:

1. Turn off the water supply.
2. Disconnect the water line and remove the old valve.
3. Install a new fill valve according to the instructions on the package.
4. Reconnect everything and turn the water back on.
5. Replacement valves are inexpensive and available at most hardware stores. 

Step 4: Check the Flapper Chain

A chain that’s too short, too long, or tangled can prevent your flapper from sealing properly. That constant trickle of water will keep your toilet running and waste gallons every day. 

Fix:

1. Leave just a little slack in the chain, enough for the flapper to close fully but not so much that it tangles.
2. Cut off any excess chain and make sure the handle moves freely. 

Step 5: Replace the Flapper

If you still hear water running, you may have a worn or warped flapper. 

Fix:

1. Turn off the water supply.
2. Remove the old flapper and bring it with you to the hardware store to find a match.
3. Install the new one, ensuring it seals tightly. 

If you can’t get a perfect seal even after replacing the flapper, you may need to replace the entire flush valve assembly. This is a job That Plumber can handle quickly and affordably. Call us today for a free quote. 

When to Call That Plumber

While many running toilet issues are DIY-friendly, some problems like worn-out valves, corroded parts, or recurring leaks require professional attention. If your toilet keeps running no matter what you try, or if you notice water pooling around the base, it’s time to call in a licensed plumber. 

At That Plumber, we repair all types of toilet issues, from running and leaking toilets to full replacements. We’ll make sure your system runs efficiently, saving you money and frustration in the long run. If your toilet keeps running or you’re considering a replacement, contact That Plumber today. Use our online form to request service, and we’ll get back to you as soon as possible.