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6 Reasons Your Toilet Won’t Flush & 6 Solutions to Fix It

If you are looking for the solutions about how to fix a toilet that won t flush, read on this guide. We list the 6 common reasons your toilet won’t flush and 6 solutions to fix it by yourself easily and quickly.

by Lane | 2019-07-13 Share:

how to fix a toilet that won t flush

A toilet that won’t flush properly is annoying, especially if you only have one toilet at home. However, this issue is easy to fix and may not require a plumber or change a new toilet. In this article, we provide you 6 reasons your toilet won’t flush and 6 basic DIY fixes to repair the toilet that won’t flush easily and quickly.

How a toilet works

Before fixing a toilet that won’t flush, learn how a toilet works first. Then you can better understand how to repair the toilet. You can remove the lid from your tank and see what happens when flushing the toilet a few times.

how to fix a toilet that won t flush

1: When you push the handle or press the button to flush the toilet, the beaded metal chain lifts the flapper, which covers the flush valve seat.

2: Water in the tank flows through the flush valve seat into the toilet bowl.

3: The water from the tank forces the waste water in the toilet bowl into the main drain.

4: The flapper valve closes once the tank is empty. Then water runs through the fill valve to refill the tank.

5: The float mechanism on the fill valve turns off the flow of water when the tank is full.

The 6 Top Reasons Your Toilet Won’t Flush and How to Fix it 

Below are the 6 common reasons why your toilet won’t flush properly and tell you how to fix it by yourself.

Reason 1: The Lift Beaded Metal Chain Is Broken or Disconnected 

Sometimes, the lift chain which attaches the flapper to the flushing handle on the outsides of the toilet, can be too loose or stretched out and make the handle unable to lift the flapper high enough to fill the water valve when you flush. 

how to fix a toilet that won t flush

Solution: How to fix a toilet handle that won t flush? You only need to adjust the length of the chain to shorten it or replace the chain to a new one. 

TIP : Shut off the water supply to the toilet and empty the tank before removing the chain. Remember to turn on the water supply after adjusting or replacing the chain.

Reason 2: The Flapper Is Bent or Worn out

The rubber flapper is used to release water when the toilet flushes and close the flush tube hole afterward. Then there is proper amount of water flows into the tank and remains here. Your toilet won’t flush if the flapper on your toilet is bent or worn out that can’t seal the flush tube hole. 

Solution: Replace a new flapper if you find it is too warped or bent. It is an inexpensive item and can be purchased from a hardware store. Turn off the water supply and empty the tank before replacing the old flapper to a new one. Then try flushing the toilet again to ensure the toilet can flush properly.

Also Read: [2019 Detailed Guide] How to Fix a Running Toilet without a Ball Float

Reason 3: Tank Has Low Water Level

A common cause of toilets won’t flush properly is not enough water in the tank. As a successful flush depends on enough force from the water flowing into the toilet bowl. If the water is not enough, the toilet may only partially flush. The water level in the toilet tank should be almost one inch below the top of the overflow tube. If the water in the tank is not enough, it will prevent the toilet from flushing. 

Solution: Check the water valve. If it is off, turn it on and watch the water level in the tank to ensure that the toilet fills water properly. If the water level is still too low, buy a new fill valve and replace the old one. 

Reason 4: The Inlet Holes Are Clogged

When you flush the toilet, you can find some water is coming from the orifices located all around the top rim of the bowl. The orifices can be clogged by the water’s mineral deposits over time. If you notice the water coming from the inlet holes is small, you have to unclog the inlet holes.

Solution: Open the fill valve and pour some hot vinegar. Don’t flush the toilet for a few hours until the vinegar dissolves the mineral. Flush the toilet to see if the water flow coming through the orifices is normal. If the water flow is still small, try to use a wire hanger to remove the mineral from the inlet holes.

Reason 5: Clogged Toilet

A clogged toilet is one of the common reasons that the toilet won’t flush properly. Using too much toilet paper or attempting to flush other debris down the toilet may clog the toilet and you might get an incomplete flush. Sometimes, you may even find some water return through the drain after the flush.

how to fix toilet that won t flush

Solution: Use a toilet plunger to plunge your toilet for 10 to 15 seconds. After plunging, try flushing the toilet again. Repeat the plunging 2 or 3 times if necessary. If you still have the problem after 3 plunging attempts, it’s time to try to unclog toilet without a plunger. Add a large bucket with hot water and pour it into the toilet bowl. Let the hot water stay for several minutes, then flush it. If that doesn’t work, you should consider snaking the toilet or getting professional help.

One Related Guide You May Need: Tips You Must Know When Unclogging a Toilet with Plunger

Reason 6: The Overflow Tube Is Cracked

If the above solutions can’t fix the non-flushing toilet, check the overflow tube. If it is cracked, the water will flow into it and prevent the tank from filling, then the toilet can’t flush.

Solution: Replace the overflow tube by a new one. You can find it in the hardware store.

The Bottom Line

Above are the 6 common solutions about how to fix a toilet that won’t flush by yourself. We hope this guide will help you solve the problem quickly and easily when it occurs. If you want to keep your bathroom cleaner, consider placing Aicool smart trash can in your bathroom.

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Related Readings for Reference

• 3 Ways to Unclog Toilet without a Plunger

• Tips You Must Know When Unclogging a Toilet with Plunger

• How to Clean a Toilet Bowl Quickly - 5 Simple Ways

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