Toilet Not Getting Water

On this page

Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

If your toilet isn't getting water, check the shutoff valve under the tank and ensure it's fully open. Then inspect the fill valve for clogs or damage and replace if necessary.

Confirm the symptom

Toilet tank doesn't fill with water after flushing
No water flows into the tank when the toilet is flushed
Toilet bowl remains empty after flushing

Tools and prep

Adjustable wrench
Screwdriver (flathead and Phillips)
Plumber's putty or wax ring (if replacing toilet)
Replacement fill valve or flapper (if needed)
Bucket or towel to catch water
Turn off water supply to the toilet before starting repairs

Step-by-step troubleshooting

Check Water Supply Valve
Do: Locate the shutoff valve under the toilet tank and ensure it's fully open.
Observe: Water should flow freely if the valve is open.
Means: A closed or partially closed valve is preventing water from entering the tank.
Next: If the valve is open and water still doesn't flow, move to the next step.
Inspect the Fill Valve
Do: Remove the tank lid and flush the toilet to observe the fill valve operation.
Observe: The fill valve should rise and allow water to flow into the tank.
Means: A faulty or clogged fill valve may need cleaning or replacement.
Next: Clean the fill valve or replace it if it's damaged.
Check the Water Supply Line
Do: Inspect the water supply line for kinks, cracks, or leaks.
Observe: A damaged supply line can restrict or stop water flow.
Means: Replace the supply line if it's damaged.
Next: If the supply line is intact, check the next step.
Test the Flapper Valve
Do: Check if the flapper valve is stuck or damaged.
Observe: The flapper should close properly after flushing to allow the tank to refill.
Means: A faulty flapper can prevent the tank from filling.
Next: Replace the flapper if it's not sealing properly.
Inspect the Float Ball or Adjuster
Do: Check the float ball or float arm for obstructions or improper positioning.
Observe: The float should rise with the water level to shut off the fill valve.
Means: A stuck or misaligned float can prevent the tank from filling correctly.
Next: Adjust or replace the float as needed.
Check for Clogs in the Toilet Tank
Do: Look for debris or mineral buildup in the tank that might be blocking water flow.
Observe: Clogs can prevent water from reaching the bowl or fill valve.
Means: Clean out any debris or use a descaling solution for mineral buildup.
Next: If no clogs are found, consider professional help.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Closed or partially closed shutoff valve The water supply is manually restricted.	Common	Easy	None
Clogged or faulty fill valve The fill valve is not allowing water to enter the tank.	Common	Easy–Medium	Fill valve
Damaged water supply line A cracked or kinked supply line restricts water flow.	Sometimes	Medium	Water supply line
Stuck or damaged flapper valve The flapper isn't sealing properly, preventing the tank from refilling.	Sometimes	Easy	Flapper valve
Misaligned or stuck float ball The float isn't allowing the fill valve to shut off properly.	Sometimes	Easy	Float ball or adjuster
Clogs in the toilet tank or bowl Debris or mineral buildup is blocking water flow.	Rare	Easy–Medium	Descaling solution or cleaning tools

Parts matching

Common replacement parts for a toilet not getting water include:

Fill valve
Flapper valve
Water supply line
Float ball or adjuster
Plumber's wax ring (if replacing toilet)

Purchase parts that match your toilet model for proper fit and function.

When to call a professional

Water supply valve is damaged and cannot be opened
Persistent leaks after replacing parts
Toilet continues to not fill with water after all troubleshooting steps
You're unsure about the correct part to replace or how to install it
The toilet is old and requires a full replacement

FAQ

Why is my toilet not getting water after I replaced the fill valve?

Ensure the new fill valve is properly installed and the water supply valve is fully open. Check for kinks in the supply line and make sure the float is adjusted correctly.

Can a low water pressure cause a toilet not to fill?

Yes, low water pressure can prevent the toilet from filling properly. Check other fixtures in your home to see if they also have low pressure, which may indicate a broader issue.

How do I know if my toilet's flapper is faulty?

A faulty flapper may not close properly after flushing, leading to continuous water flow or no refill. Check if the flapper is worn, damaged, or not sealing tightly against the valve seat.

What should I do if my toilet tank is empty but the water supply valve is open?

Check for a clogged or faulty fill valve, a damaged supply line, or a stuck float. If no obvious issues are found, consider calling a professional plumber.