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Four Causes Of A Slow Toilet Fill

Four Causes Of A Slow Toilet Fill

Is it taking too long for your toilet to refill after a flush? A common problem for households is this one. This difficulty could be caused by a number of problems. Recognizing the issue may help you select the best answer so you can get your toilet running as efficiently as feasible once more, even if none are really serious or expensive to fix.

Why Does Your Toilet Fill Slowly?

One of four potential causes—a clogged vent, a clogged drain, broken plumbing, or a blocked pipe—could explain why your toilet takes a long time to fill.

  1. One blocked vent. If your vent is blocked, the water will fill up more slowly since the air in the tank won’t be able to escape. Take off the roof’s cover and investigate to see whether your vent is obstructed. Clean it out to see if that fixes the issue if it’s blocked with leaves or other debris.
  2. A backed-up drain. Your toilet tank’s bottom drain also needs to be clear for it to function correctly, so you might want to try clearing it out with a little vinegar and baking soda.
  3. Plumbing issues. If your vent or drain is working properly, you might want to look for any leaks in your plumbing system. Your toilet will fill up more slowly than it should if a pipe is leaking
  4. A pipe blockage. Your toilet will fill slowly if something is preventing water from entering your tank (often a piece of paper or a toy).

How Do I Fix a Toilet That Fills Slowly?

Once you’ve determined the cause of your toilet’s delayed filling, you can typically fix it rather quickly. You can unclog a clogged vent, drain, or pipe by yourself. You might need to get a professional to take a look if the problem is with the plumbing. In any event, you can try the following four fixes to get your toilet operating normally once more:

  1. Unclog the obstructed vent

Use a pair of needle nose pliers to remove anything stuck within the vent if it is blocked. If you want to unclog your drain, try using vinegar and baking soda. Add one cup of baking soda and six cups of vinegar to the tank. After about 10 minutes, plunge it again and flush the toilet.


  1. Unclog the obstructed drain.

Pour a little vinegar and baking soda down the drain. Pour half a cup of baking soda and six cups of boiling water down the drain after letting it settle for about 10 minutes. If it doesn’t clear it out, you might try using a snake to remove any obstructions.


  1. Fix any plumbing leaks you may have.

You need to have your plumbing fixed by a professional if it is leaking.

  1. Clear any obstruction from the pipe

Use a plunger to clean out anything that is preventing water from entering your tank. Pour boiling water down the drain to assist clear any obstructions.

I’m hoping one of these solutions will make your toilet fill slowly work again. If you require assistance, don’t hesitate to ask a specialist!


It might be necessary to call a plumber if none of these fixes are successful. A toilet that fills slowly might waste a lot of water, so it’s crucial that you can count on it to flush effectively every time.

For toilet repair and replacement services, use BJC Clifton Plumbers.

Contact BJC Clifton Plumbers for the assistance you require if you’re experiencing issues such as a slow-filling toilet. We are professionals in our trade and are prepared to handle your plumbing issues. Call (973) 858 5005 right away to get started!