This common occurrence has a few causes, and most of them can be easily fixed by you. Some repairs take only a few minutes of your time. So Why Is the Water Level in My Toilet Bowl Low?
Damaged Fill Tube
This is the most common reason for the low water level in your toilet bowl. The fill tube is the device that allows water to flow in the toilet every time it is being flushed. However, it can unclip from the overflow tube over time or get damaged by time. When this happens, water will fill the toilet tank, causing the valve to shut off the water on the bowl before it fills with the adequate amount.
You can fix this by lifting the tank lid and inspecting the fill tube to know if it has moved or it if has been damaged. If you find that it has moved, put it back into the proper place.
Damaged Fill Valve
If your fill valve is damaged, you can easily purchase a new one at any hardware store. Make sure that it is the same as the one you are replacing.
You can fix this by replacing the damaged fill valve.
Blocked Sewer Vent Line
This is a rare instance, but it does happen. This vent line is an important part of your plumbing as it removes the sewer gases when you flush the toilet. When no air flows through the vent line, it affects the water level. The reasons why there is a blockage could be from debris on your roof, dead animals, or a bird’s nest.
You can fix this by removing the debris on the roof and inserting a plumber’s snake on the blockage. If this does not work, call a professional plumber.
Cracked Toilet Bowl
This is also a rare instance but is also possible. If there is a crack, the water will flow on the floor, resulting in low water levels.
To fix this, you would need to call for professional help since your toilet bowl has to be replaced.
How to Get More Water in the Toilet Bowl
One of the best ways to do this is to adjust the water levels at the tank. To do this, you should shut off the fill valve first. After that, remove the tank cover to check the water level in the tank. The water level should be one inch below the overflow tube. If you observe that it is lower than that, this means that there is not enough water in there to fill the bowl when you flush it. Adjust the float to correct this.
Another thing you can do is check for a clog. Fill a container with 5 liters of water and then pour it down the toilet bowl. If it does not go down as expected, then the colon is most likely blocked. Check if anything is blocking it down there. If not, then use a plunger.
You could also check the plumbing vents and clear them. Listen for gurgling sounds every time you use the toilet. If you hear such sounds, then it means that the vents are blocked. You can clear the vents by spraying water on it.
If you see a crack on your toilet, then be sure to have it replaced straight away. You would need to call for a professional plumber to do this for you as this is quite a tedious process that only someone with professional experience could handle. Do not attempt it yourself as you might end up damaging more than your toilet.
You can watch this video to learn how to repair your toilet: