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Constantly flushing toilets can waste thousands of liters of water every day, rising water bills greatly affect your family’s activities. Fixing it in a timely manner not only saves you money, but also solves the nuisance of noise. Here are a few causes of a leaking toilet, and you can completely fix it yourself without any special tools or expertise. The key to the problem is finding out the cause and location of the leak. Once you’ve identified it, you’ll be able to deal with it quickly.
Steps
Identify the problem of the drain valve
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Lock the pipe leading to the toilet. Before checking, you need to lock the water supply pipe to the toilet. Slide the lever to drain all the water in the tank. This will keep water from entering the tank while you consider repairs.
- The flush valve is a round piece of rubber that prevents water from flowing from the tank into the toilet. When we pour the water, the chain will pull the rubber cap up so that the clean water pours into the tub.
- An improperly functioning flush valve is the most common cause of toilet flushing problems.
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Open the toilet lid and look inside. Line a towel in a corner or in a safe location that won’t get in your way. Hold the porcelain lid firmly with both hands and then lift it up. Place it on a pre-lined towel to avoid collisions.
- The toilet lid is made of heavy and fragile materials, so be careful to put it in a safe place.
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Consider the length of the connection between the relief valve and the lever if necessary. If the wire is too long or too short, the drain valve will not work properly. If the wire is too short, the valve will always open when it is not needed and the water will pour into the tub continuously. If the wire is too long, the valve cover will not be pulled up when you turn the lever, and water cannot flow out. [1] X Research Source
- If the chain is too tight, remove the hook that attaches the chain to the lever, moving it up a notch or two. When the length is just right, hook it back onto the chain and lever.
- If the chain is too long, cut the top part of the chain with metal pliers. After proper alignment, hook it back to the toilet lever.
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Check the drain valve to find the problem. Remove the drain valve by removing the hinge between the drain valve and the overflow pipe, which is the open pipe in the middle of the tank. Observe the drain valve for deposits, deformation, discoloration, decay, or other signs. [2] X Research Source
- You can clean the drain valve if it is clogged.
- If the valve is damaged in shape and size, it should be replaced.
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Clean the drain valve. The residues in the water for a long time can stick to the drain valve, causing the valve to not close properly and the water to flow continuously. [3] X Source of Research To clean the drain valve, soak it in a bowl of vinegar for about 30 minutes, then scrub it away with an old toothbrush.
- When the drain valve is clean, put it back in place. Hook the latch on the hinge on the hose back to the drain valve.
- Turn on the water so that the tank is fully discharged.
- Listen to the sound of running water to see if the problem is fixed.
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Replace damaged drain valve. Take the damaged drain valve to a specialized store and buy a new one of the same type, shape, and size. You can also purchase a regular flush valve, which can fit most toilet models. [4] X Research Sources
- To install a new drain valve, set it in place and mount it on the hinge on the overflow pipe.
- Turn on the water and flush to see if the system is working properly, if the water is no longer flowing continuously, you have succeeded.
Adjust the water level
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Check the water level. If the flush valve is not the cause of the toilet leak, the next most common reason is the water level. If the water level is too high, it will overflow through the overflow pipe.
- When the tank is full and the water is still flowing continuously, look and the pipe overflows. The overflow pipe is located in the middle of the tank connecting the water tank to the toilet.
- Check if water is continuously flowing into the overflow pipe. In case the water level is too high, adjust it by lowering the float ball. [5] X Research Sources
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Identify the type of float ball you are using. Water enters the tank through the water supply valve. The float ball connects to the water supply pipe to adjust the low or high water level. The height of the float shows when the tank is full and the water supply valve is closed. So you can completely lower the water level by adjusting the height of the float ball. There are two main types of float balls: [6] X Research Source
- Round float ball, toilet flusher will have a crossbar with one end connected to the water supply valve, the other end connected to the float ball.
- The funnel-shaped float ball, as the name suggests, has a small cylinder that surrounds the water supply valve.
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Lower the float ball for round floats. On the top of the water supply valve there is a screw connecting the crossbar of the float ball to the supply valve. By turning this screw, you can adjust the height of the float. With a screwdriver, tighten the screw one quarter clockwise to lower the float ball. [7] X Research Sources
- Wipe the toilet and wait for the water to fill the tank. Check the water level again.
- In theory, the water level should be 2.5 to 3.8 cm below the top of the overflow pipe. Continue to adjust the screw of the supply valve until the water level is just right. [8] X Research Sources
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The same goes for funnel-shaped floats. Similar to the circular float ball system, on the supply valve of the funnel-shaped float ball system there are screws for you to adjust. When you tighten or release the screw, the float ball will be raised or lowered. Turn the screw one quarter clockwise to lower the float. [9] X Research Source
- Wipe the water and wait for the water tank to be filled up.
- Check the water level.
- Continue to align by tightening the screw one-quarter clockwise until the water level in the tank is 2.5 to 3.8 cm below the top of the overflow pipe.
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Check the water supply hose if the toilet is constantly running water. The water supply pipe is attached to the supply valve with the task of refilling the tank after the water has been drained. This pipe must always be above the water, otherwise the water will flow continuously. When the tank is full, make sure that the water supply hose is not submerged in water.
- To fix a water supply hose that is submerged in water, simply cut it short so that the end of the hose just sits above the water. [10] X Research Source
Replace water supply valve
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Turn off the water and drain all the water in the tank. After the drain valve and water level have been checked and repaired, but the toilet is still not working properly, the problem is now in the water supply valve. The solution for you is to replace the water supply valve. To do this, you need to empty the tank: [11] X Research Source
- Turn off the water going to the toilet.
- Drain off the water.
- Use a sponge to soak up any remaining water from the tank. Soak the sponge in the sink, wring it out, continue until there is no water left in the tank.
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Turn off the water that flows into the toilet. Outside the toilet, there is a water pipe leading to the tank. To shut off the water, turn the shut-off valve on the pipe. Turn it a quarter clockwise to lock the water supply line.
- You may have to use an alkaline because this shut-off valve is a bit stiff. [12] X Research Source
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Remove the main water supply valve in the tank. Once the water line is locked, you can pull the old supply valve out of the water tank. Do this by using an adjustable wrench to turn the buckle belt to the left (counterclockwise). Once the locking pin is off, you can pull the old inlet valve out of the toilet. [13] X Research Source
- Take it to a specialty store and buy a replacement supply valve. This way you can ensure that the replacement supply valve is the same size and design as the old one that has failed. [14] X Research Source
- You can replace the round type float ball of the supply valve with a more modern funnel-shaped float ball.
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Install a new supply valve and connect to the water source. Install the new supply valve in its place in the water tank. The supply valve needs to fit snugly into the hole in the tank where the water will flow. Tighten the nut clockwise to tighten it.
- Once the nut has been tightened by hand, use the pliers to turn the nut another quarter turn to tighten.
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Connect the water supply hose. Connect the water supply hose to the sprinkler at the top of the inlet valve. Adjust the position of the supply hose so that water flows into the overflow pipe. If there is a clamp on the overflow pipe, clamp the water supply hose to hold it in place. [15] X Research Source
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Float alignment. See the system manual to re-align the float ball height to the new supply valve. Use a tape measure to measure the height from the bottom of the tank and adjust the height of the supply valve by tightening the screw at the top of the valve. [16] X Research Source
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Check the supply valve. Turn on the water to fill the tank with water. Check the water level, make sure the supply hose is not submerged in the water, and listen for the sound of running water to see if everything is stable. Adjust the height of the float if necessary. Slide the flush lever to test the toilet a few times and wait for the water to fill the tank to check everything again.
- When you have successfully repaired the toilet and the water is no longer leaking, carefully put the porcelain lid of the water tank back in place.
X
This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
There are 9 references cited in this article that you can view at the bottom of the page.
This article has been viewed 57,974 times.
Constantly flushing toilets can waste thousands of liters of water every day, rising water bills greatly affect your family’s activities. Fixing it in a timely manner not only saves you money, but also solves the nuisance of noise. Here are a few causes of a leaking toilet, and you can completely fix it yourself without any special tools or expertise. The key to the problem is finding out the cause and location of the leak. Once you’ve identified it, you’ll be able to deal with it quickly.
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