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Why Is There No Water In My Toilet Tank?

Sidney & Richardson • Jan 24, 2023

There are many reasons why a toilet may not be filling with water after flushing and identifying the root cause is crucial in getting it back to working order. Below are some common causes that may explain why your toilet isn’t filling with water to help you decide the next course of action…

Clogged Toilet

A toilet that isn’t filling with water may be due to a clogged drain or sewer line. This can result from a build-up of hair, toilet paper, corrosion, damaged joints, bends in the pipe which collect debris, bulky items such as paper towels, wipes and sanitary products or even tree roots growing into the sewer line. You can try using a plunger to fix a clogged toilet, but for more serious blockages it’s best to call a professional

Leaky Or Misaligned Fill Valve

The fill valve is responsible for controlling the flow of water into the toilet tank. If leaking or misaligned, it can cause the water level in the tank to drop, resulting in the toilet not filling with water. To fix this, you’ll need to adjust or replace the fill valve.

Running Toilet

A toilet that is constantly running can also cause the bowl not to fill with water. This is typically caused by a faulty flapper or flush valve; replacing these parts can usually fix a running toilet.

Low Water Pressure

Low water pressure can be caused by a variety of factors, including a clogged water main, a leak in the water supply line or a problem with the water pressure regulator. In this case, calling a plumber is the best course of action.

Broken Float

The float is responsible for controlling the water level in the tank, and if broken, it can cause the toilet not to fill with water. Additionally, a float ball positioned too low can also prevent water from getting inside the tank. Replacing or repositioning the float will usually fix this issue.

Cracked Bowl

A small puddle of water at the toilet base may indicate cracks in the toilet bowl; these cracks are potential gaps for water to escape before it has a chance to fill the bowl. 


While wear and tear is inevitable over time, proper maintenance and regular check-ups can often prevent these issues and save you from costly repairs. However, when problems do occur, calling a plumber is usually the best option to ensure your toilet is restored to full working condition.

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