5 Reasons Your Toilet Is Filling Slowly

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5 Reasons Your Toilet Is Filling Slowly
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If your toilet is filling slowly, it can be a real pain – especially when you’re in a pinch for time. You have to wait longer for it to fill up, and then you might have to flush multiple times in order to get everything down. In this blog post, we will discuss 5 common reasons why your toilet might be filling slowly. Hopefully this information will help you troubleshoot the problem and get your toilet working properly again!

What causes toilet tanks to fill slowly?

Your toilet could be filling slowly for a number of reasons, but don’t worry, most of the common reasons are easy fixes that you can DIY without having to call a plumber to your home:

1. Water supply valve.

One of the most common reasons a toilet tank fills slowly is because the water supply valve is closed or partially closed. When this happens, not enough water can flow into the tank, and so it takes longer to fill up.

How to fix:

If you determine that the water supply valve is the issue, follow these steps:

  1. Open the water supply valve all the way.
  2. Check to see if the water is flowing freely into the toilet tank.
  3. If the water is not flowing freely, you might need to clean out the valve. To do this, turn off the water supply and unscrew the valve from the pipe. Use a wire brush to clean out any debris inside of the valve, then reattach it.

If this doesn’t work, call a plumber to have a look at the valve.

Water supply valves can sometimes get clogged with sediment or debris, which can cause them to close partially and slow down the flow of water into the toilet tank.

2. Check your float ball.

If the float ball is floating too high or too low, it can cause the toilet tank to fill slowly. If the ball is floating too high, the water will flow into the tank faster than it can be emptied, and so the tank will fill slowly. If the ball is floating too low, on the other hand, not enough water will enter the tank.

How to fix:

This is a simple one! In order to fix a float ball that’s too high or too low, you just have to adjust it. To adjust a float ball that’s too high, simply bend the arm of the float ball down so that it doesn’t reach the water level.

3. Clogged drain pipe.

If your toilet is filling slowly because the drain pipe is clogged, you’ll need to clear the clog before you can fix the problem. You can do this by using a plunger or a drain snake (tip: if you’re not sure how to use a drain snake, read more about how to use a drain snake to clear clogs here).

How to fix:

Depending on the severity of the clog, you might be able to clear it yourself using a plunger or a drain snake. If the clog is more severe, you’ll need to call a plumber to clear it for you.

Once the clog is cleared, the toilet tank should fill up normally.

4. Bad flapper valve.

If the flapper valve is old, worn out, or dirty, it might not be sealing properly, and so water will leak out of the tank and into the bowl slowly, causing your toilet to fill slowly.

How to fix:

Replacing a flapper valve is an easy DIY project that most homeowners can do themselves. To replace the flapper valve, follow these steps:

  1. Turn off the water supply to the toilet.
  2. Detach the old flapper valve from the tank.
  3. Attach the new flapper valve to the tank.
  4. Restore water supply to the toilet.

5. Low water pressure.

If the water pressure in your home is low, it will also cause the toilet tank to fill slowly. You can test the water pressure in your home by using a water pressure gauge, or by checking the water pressure rating on your faucet.

How to fix:

You might be able to fix this by adjusting the water pressure regulator on your water heater, or you might have to call a plumber to increase the water pressure in your home. If you’re renting, then call your landlord to see if they can’t do this for you.

What if you can’t fix it yourself?

Call a plumber! Western Rooter & Plumbing has been in business for more than 35 years, and we have seen all sorts of plumbing issues in our day. Toilets that fill slowly are one of the simplest fixes for us, and we can normally be in and out of your home within an hour. Give us a call today!

John, Larry, Mike, owners of Western Rooter & Plumbing

Need expert plumbing help?

If you’re having plumbing issues or emergencies, contact Western Rooter & Plumbing online or call our dispatch center at (626) 448-6455. We are the Los Angeles County and San Gabriel Valley’s number one plumbers – don’t wait, call now!

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