If Your Toilet Won't Flush

Quick answer

If your toilet won't flush, check for a clogged drain, low water level, or a faulty flapper. Use a plunger or auger to clear clogs, adjust the float, or replace the flapper if needed.

Confirm the symptom

• Toilet handle turns but no water enters the bowl
• Toilet flushes weakly or not at all
• Water level in the tank is too low
• Toilet tank fills but doesn't shut off water
• Toilet bowl overflows when you try to flush

Tools and prep

• Rubber gloves
• Plunger
• Toilet auger (snake)
• Adjustable wrench
• Screwdriver
• Bucket
• Turn off water supply to the toilet
• Ensure the area is dry to prevent slipping

Step-by-step troubleshooting

1. Check Water Supply
   Do: Locate the water shut-off valve near the base of the toilet and ensure it's fully open.
   Observe: Water should flow into the tank when the valve is open.
   Means: If no water flows, the valve may be closed or clogged.
   Next: Clean or replace the shut-off valve if necessary.
2. Inspect Flapper Valve
   Do: Remove the tank lid and check the flapper for damage or wear.
   Observe: The flapper should seal tightly and lift fully when the handle is pressed.
   Means: A faulty flapper can prevent water from entering the bowl.
   Next: Replace the flapper if it's damaged or doesn't seal properly.
3. Clear Clogs
   Do: Use a plunger to create a tight seal over the drain hole and pump vigorously.
   Observe: Water should drain from the bowl, and the toilet should flush normally.
   Means: A clog in the drainpipe is preventing proper flushing.
   Next: If plunging doesn't work, use a toilet auger to clear the clog.
4. Adjust Float Level
   Do: Check the float in the tank and adjust it so the water level is about 1 inch below the overflow tube.
   Observe: The water should stop filling once it reaches the correct level.
   Means: A low water level can result in weak or failed flushes.
   Next: If the float is faulty, replace it with a new one.
5. Check for Blockages in Trapway
   Do: Use a toilet auger to snake the trapway and remove any obstructions.
   Observe: The auger should pass through the trapway without resistance.
   Means: A blockage in the trapway is preventing proper drainage.
   Next: If the auger can't clear the blockage, consider calling a professional.
6. Test Flush Mechanism
   Do: Press the toilet handle and observe the chain connected to the flapper.
   Observe: The chain should lift the flapper fully and release it to allow water to flow.
   Means: A loose or broken chain can prevent the flapper from opening properly.
   Next: Adjust or replace the chain if necessary.

Common causes

Parts matching

Common parts needed to fix a toilet that won't flush include:

• Toilet flapper
• Toilet auger
• Float assembly
• Shut-off valve
• Flush handle assembly
• Fill valve assembly
• Wax ring

Purchase parts that match your toilet model for compatibility and performance.

When to call a professional

• The toilet continues to overflow despite clearing clogs and adjusting water levels.
• You notice cracks or leaks in the tank or bowl.
• The problem persists after replacing multiple parts.
• You're unable to locate or access the water shut-off valve.
• The toilet is old and requires extensive repairs or replacement.

FAQ

Related guides

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