How to Fix Toilet Tank Not Filling with Water After Flushing (7 Easy Solutions)

Imagine realizing your toilet is not flushing just when you really need it to. Disappointment and frustration do not reasonably describe what you would feel. Believe it or, a toilet that won’t flush because the toilet tank will not fill with water is a common issue in many homes. If you have a toilet tank not filling with water after flushing, Don’t let this issue get you down – read on for tips on how to fix a toilet bowl!

For starters, can you survive without a toilet? Your guess is as good as mine. We literally cannot live without toilets, and we all have at least one in every home. This is why some basic knowledge on how to fix a toilet tank not filling with water after flushing is necessary.

The bathroom is perhaps the most used facility in your home. Like other frequently used systems, the toilets are susceptible to wear and tear. With each use, the toilet flush mechanism gets a little worn out, and with continued use, it is bound to start developing problems. Some basic knowledge on fixing a toilet tank not filling with water after flushing is useful. But, how do you fix what you do not understand?

Astonishingly, most people have no idea how a toilet system works. They found a working toilet and assume it should continue working just fine. Imagine realizing that your bathroom does not work just after using it because the water level is too low. Where would you start? How would you fix a toilet tank that is not filling with water after flushing?

Parts of a toilet

The first step in fixing a toilet tank that does not fill with water after flushing is to understand how the toilet system works.

Do you know all the parts of a toilet? The most basic elements are what you see on the outside; the toilet tank, the flush handle, and the sitting bowl. Of course, there are more parts inside.

Believe it or not, this basic knowledge of the importance of water and the required level comes in handy when fixing a toilet bowl not filling with water after flushing. It would be very embarrassing if one had a visitor and the toilet won’t flush because of low water levels.

Toilet Tank Not Filling with Water After Flushing: Causes and Solutions

If you realize you have a toilet tank not fill with water after flushing where do you start? There are a few things you can try to fix the tank. We will go over the possible causes and solutions starting from the most likely to the most unlikely cause

Supply Valve

The very first thing you should check is the supply valve. It is the pipe that supplies water to the tank. At time, the supply valve can shut by itself, or someone might mistakenly shut it. Turning on the supply valve is the quickest way of fixing a toilet tank water levels.To solve this, you should rotate the supply valve until water starts flowing in. In other cases, the valve might be old and worn out and need to be replaced. A supply valve that does not let in water even after opening it is probably faulty.

Problems with the Fill Valve

One of the most common causes would be a jam or blockage in the fill valve or the toilet trap.

The fill valve is what allows water to enter the tank after it has been emptied during a flush. Resolving problems with this part helps fix toilet tank not filling with water after flushing.

The supply is located at the top of the tank and is usually controlled by a float ball. If the fill valve is not working correctly, it will prevent water from entering the tank, causing the toilet tank not to fill with water after flushing.

First, you should confirm that the valve is appropriately fixed and placed as improper positioning interferes with the water flow. If the valve is set correctly, check for possible debris blockage that may be preventing water from getting through the valve. Remove visible debris or dirt.

If this is ineffective, the fill valve may be faulty. Replacing a faulty fill valve is another option when the toilet tank won’t fill with water after flushing.

Checking if the fill valve is faulty:

  • Turn off the water to the toilet.
  • Flush the toilet to empty the tank.
  • Remove the lid from the tank and locate the fill valve.
  • Check to see if water enters the tank through the fill valve.
  • If water is not entering the tank, you will need to replace the fill valve.

Steps to replace the fill valve:

Turn off the water to the toilet.

  • Flush the toilet to empty your tank.
  • Remove the lid from the back of the toilet and flush again so that all of the remaining water drains out.
  • Unscrew retaining nut with the old valve in place using adjustable wrenches or pliers.
  • Gently pull out the old valve making sure not to damage the rubber gasket.
  • Take the old valve to the hardware store so that you can find an exact replacement.
  • Install new valve, making sure not to over tighten the retaining nut.
  • Reattach the water supply line and turn on the water at the shutoff valve.

Test new valve by flushing toilet several times.

Low float ball

If your toilet tank isn’t filling up with water after flushing, the other thing you should check is the float ball.

The float ball is a plastic ball that sits in the tank and rises as the water level increases. If the float ball is not high enough, it will prevent water from entering the tank. Adjusting the float ball level is a common step when fixing a toilet tank water level issues.

To fix this, simply adjust the float ball so that it is higher in the tank by following the following steps.

Steps to adjust the float ball:

  • Turn off the water to the toilet.
  • Flush the toilet to empty the tank.
  • Remove the lid from the tank and locate the float ball.
  • Adjust the float ball so that it is higher in the tank.

Replace the cover on the tank and turn on the water.

Leak in the flush valve

Another common reason why your toilet tank won’t fill with water after flushing is a leak in the flush valve. The flush valve allows water to enter the tank when you flush the toilet. It is typically located at the bottom of the toilet tank.

If there is a leak in the flush valve, water will escape from the tank and into the bowl. This can cause your toilet to stop flushing properly.

To fix a leak in the flush valve, you will need to replace the flush valve seal.The seal works by creating a watertight barrier between the tank and the bowl.

Steps to replace the flush valve seal:

  • Turn off the water to the toilet.
  • Flush the toilet to empty the tank.
  • Remove the lid from the tank and locate the flush valve at the bottom of the tank.
  • Unscrew the flush valve from the tank.
  • Remove the old seal from the flush valve and replace it with a new one.
  • Reattach flush valve to tank and turn on water supply.
Cracks and leakages

Another possible cause of the water level dropping could be if there is a crack in the toilet tank. A crack in the tank would cause the water to leak and hence a drop in the water level. A crack is usually unnoticeable, but if one can locate it, you can use a sealant to fill the crack.

A sealant is not the most effective as it would only be temporary. Sooner or later, you would have to fix it again. The most suitable solution for this is removing the tank and replacing it.

There are other components of the toilet that are prone to leaks. The most common culprits would be either the flush or fill valves. These are responsible for managing water flow from the toilets tank to the bowl. Mostly, this happens because the toilet is old and the valves need replacement. If you notice a leak in the fill and flush valves, use the steps outlined above to replace them.

Low water pressure

Sometimes, you notice that the water level is low, but the tank is not completely empty. Low water pressure in the water piping system means that enough water does not get into the toilet tank.

One sign of low water pressure is high-pitched faucet noises when you attempt to flush the toilet. Low water pressure is mainly a result of problems with water systems in the house. It may also be caused by leakages in any of the toilet components. Unfortunately, low water pressure can be challenging to fix as the issue can come from more than one component. In some cases, you may need a professional plumber to fix.

How do you fix this?

The first thing you should check is the level of water in your tank. It should be about an inch below the top of the tube in the middle of the tank when full. If not, adjust the float in the tank until the water reaches the required level. Check if the fill tube (one that supplies water to the tank) has a leak or blockage.

Flapper Issues
toilet flapper

The toilet tank has a flapper at the bottom part. The flapper is connected to a chain that goes to the handle. When flushing your toilet, you move the handle, and the chain in return lifts the flapper. If the flapper is not well set, it will case your toilet tank not to fill with water after flushing.

 How is this? The length of the chain is what you should check. If it is too long too short, it will with water outlet rate. If the chain is too long, the flapper will not rise to the supposed point. This will result in the water draining slowly at low pressure. To solve this, you shorten the length of the chain such that it is only about half an inch lose. Be careful not to shorten the chain too much as it would cause the flapper to start leaking.

If you have a toilet tank not filling with water after flushing, we hope this article has been on of help. With this guide, we are confident that how have learned how to fix your toilet bowl.

In case you try all the above and your toilet bowl still doesn’t fill with water after flushing, We recommend you contact a qualified plumber in your area.

Please feel free to share this blog post with anyone who might need it. And if you have any questions or comments, please leave them below – we’re happy to help!

How has your experience been with a toilet tank that doesn’t fill up with water after flushing? Let us know

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