Toilet Not Filling With Water: 3 Amazing Ways To Fix

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Written By Will Dietrich

I love gardening, building, making and fixing things. 





Is your toilet not filling with water? Well then you’ve found the right article, we’re going to explain 3 amazing ways you can fix this issue


After every time it’s flushed, a toilet’s tank is meant to fill with water. The water level should be half a couple centimeters short the overflow tube and take about ten to twelve seconds to refill. We can tell you 3 amazing ways to fix your toilet if it is filling slowly or not at all.

A faulty fill valve,  the toilet float (ballock) could be at the incorrect height, the flapper could be leaking, or even the water pressure could be too low, these are all classic telltale symptoms of a toilet that isn’t filling with water fast enough. When your toilet tank won’t fill with water make sure that the water shutoff valve has been fully opened.

What to do next?

The toilet will have either a float cup or a float ball. Modern toilets have float cups, which are noticeably smaller, compared to the old toilet models which will have a float ball.

The closing and opening of the toilet valve is controlled by a toilet float. The level of the toilet float will also determine the water level, so if the  toilet float isn’t set high enough, the water level is also going to be low. However, if the toilet float is set too high, you’re going to have the opposite problem, the tank will fill with excess water and continue flowing down into the actual toilet bowl itself. This usually is the reason a toilet can’t stop filling up.

Water Pressure check

The most likely reason for a slow filling toilet, other than a faulty fill valve, is that water pressure in your toilet could be too low. This is usually caused by old pipes or water pipes leaking.

First we need to determine if the low water pressure is only affecting your toilet or all of the other plumbing in your home.  If only the toilet is being effected you can start by checking the water supply line.

Remove the water supply line,  and blow some air through it. If it comes out fine and there’s no visible blockage, then it may be possible that the problem is with the main water pipe. This will generally not be a DIY job, unless you’re an experienced professional plumber. In which case you won’t need to read this article.

Check the water supply valve

toilet not filling with water

When a toilet tank does not fill at all,  one of the first things to do is to check if the water supply valve is open. It is will be located on the rear wall of the toilet give it a counterclockwise turn to open it.

There are some toilets with a push/pull valve. Pushing the valve handle inwards will open your water supply to the toilet. Pulling the valve out will do the opposite. Both of these are actually pretty simple solutions, you do not need to call a professional plumber to do this.

How Do I Adjust the Toilet Float?

  • We’re going to start by turning off the toilet’s water supply, to do this turn your water shutoff  valve clockwise.
  • Now we want to remove as much water as possible, so to do this hold down the flush handle, and hold it down for a minute so that the most water is removed.
  • Carefully remove your toilet lid off the tank and identify whether your toilet uses a float cup or a float ball.
  • For those of you who find a floating ball, you’re going to need to find the a screw, it should be where its float arm and the toilet fill valve connect. Once you have located the screw, use a flat-head screwdriver, turn the adjustment screw clockwise, it should then raise the water level within the tank.
  • If you happen to have a float cup, start by locating the long screw which will be connected adjacently to the float. Use a screwdriver to turn this screw clockwise, the level of water will then start to raise.
  • Make sure you don’t turn the adjustment screws too much during one turn, do it little by little. Now keep on closing and opening the water shutoff valve until the inflow of water brings the water level to just halfway up the toilet’s overflow tube.
  • If this was successful, place the tank lid back upon the toilet tank and enjoy your fully functioning toilet once more.

If this didn’t solve the issue, it is going to get a little complicated. It may be worth calling a professional plumber.

Fix your Toilet Valve

  • Close the shutoff valve to your toilet.
  • Flush your toilet, again holding the flush handle down long enough to ensure the most water is removed.
  • Using your preferred hand, hold the fill valve at the bottom section, use your freehand to rotate the valve cap, in a counterclockwise direction, rotate it ever so slightly, to about the ten o’clock position.
  • Check for any debris in the holes.
  • Fully open your water shutoff valve, the pressure of the water should forcefully remove any of the debris previously blocking it. Also you might want to hold an empty cup or bowl over the fill valve – there will be water splashing.
  • When this successfully unblocks the valve you can put the fill valve cap back on.

What will it cost me?

Plumbing issues left unsolved it could potentially cost you a lot. If none of the solutions in this article work, then it really is time to call a professional plumber, depending on the issue this could cost less than $150.00 If it is your property, depending on the issue it may also be worth checking your  homeowners insurance policy. However if you rent, you should definitely contact your landlord.


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