Water Leaking into Toilet Bowl

Water leaking into toilet bowl is silently, but surely raising your water usage, and subsequently your water bill. Toilets with a leak are basically burning money. But with a few minutes and the right steps, you can stop water leaking into the toilet bowl.

What you are experiencing is linked to one of two issues (or both): it’s either a faulty flush valve or the fill valve. Both make up the system that drains and fills your toilet with water, respectively. Here’s how you fix both.

How to Stop Water Leaking into Toilet Bowl

Like any issue, the first step you should take is confirming that there is indeed an issue with your toilet. There’s a very clever method to double-check if water is leaking into the toilet bowl by using food coloring. No, it won’t harm your toilet. If you don’t have any, you can use colored fabric softener.

1. Take the lid of the back of the tank and pour a half cup of fabric softener or food coloring into the tank.

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2. Wait 10 minutes.

3. Lift the seat up. Is there coloring or detergent in the toilet bowl? Then you definitely have a leak.

But from where? Again, it’s either the flush valve or the fill valve. You can check by marking the water level of the tank, then shutting the water supply valve off. If the water drops, it’s the flush valve. However, if water is running into the overflow tube—that’s the hollow tube in the middle—then it’s an issue with the fill valve. We’ve provided steps for both.

Replacing the Flush Valve

Before you attempt to replace the flush valve, it’s best you get acquainted with the system. Remove the lid from the back of the toilet. The flush valve is located on the right-hand side. There’s a hollow tube that leads to a flapper valve, which covers the seat (where the water escapes to). When you pull the handle of the toilet down, it lifts the flapper valve, water escapes, and the toilet is flushed.

Now let’s teach you how to replace a flush valve. You will need:

1. Shut off the water with the water supply valve in the back. Take the lid off the back of the toilet, and flush. This will remove the water from the tank.

2. Once the water has been removed, place the bucket directly under where the water supply hose is connected to the back of the tank. Unscrew the water supply hose from the tank. Any remaining water will be caught by the bucket.

3. Unscrew the mounting bolts, lift the tank away from the toilet seat, and place it upside down in a large bin.

4. Now, you should be staring at the sponge gasket, a rubber-like piece that’s hiding a lock nut. The lock nut is holding the flush valve in place. Use your rib joint pliers to unscrew the lock nut and pop the flush valve out.

5. Position your new flush valve into place with the seal attached at the end. On the other end, position the external seal into place and cover it with the new lock nut. Hand tighten it, then tighten it the rest of the way with rib joint pliers. Cover the lock nut with the gasket.

Note: Do not use old lock nuts. Use the new ones provided in your flush valve replacement kit.

6. Attach the flapper valve to the flush valve as well as the chain.

7. Slide in the new mounting bolts, accompanied with washers, and set the tank on the toilet. You have to line up the mounting bolts with the holes on the toilet seat. Tighten the mounting bolts into place with lock nuts.

Tip: Optimal tightening means the tank should never wobble while sitting on the seat.

8. Attach the water supply hose to the toilet again and release the water supply. The toilet will fill with water.

Replacing the Toilet Fill Valve

Before you attempt to replace the toilet fill valve, it’s best you get acquainted with the system. Remove the lid from the back of the toilet. The fill valve is located on the left-hand side. From the top of it, you should see a short tube that snakes over to a hollow tube—that’s the overfill tube.

The fill valve is named for a simple reason: it’s responsible for filling the toilet with water after flushing. It’s the other half of the system that is the toilet. There’s a float at the top of the valve that, when it reaches a specific spot, halts the process. If the float fails, the overfill tube is supposed to prevent water from overflowing out the top.

Now let’s teach you how to replace a toilet fill valve. You will need:

1. Shut off the water with the water supply valve in the back. Take the lid off the back of the toilet, and flush. This will remove the water from the tank.

2. Once the water has been removed, place the bucket directly under where the water supply hose is connected to the back of the tank. Unscrew the water supply hose from the tank. Any remaining water will be caught by the bucket.

3. Use your rib joint pliers or adjustable wrench to unscrew the lock nut holding the fill valve in place. It’s located on the end where the water supply hose meets the fill valve on the outside.

4. Remove the fill valve and place it in the bucket. It may still be leaking water.

5. With your replacement toilet fill valve, you can adjust the height of the float. The top of the fill valve should only be within an inch and a half from the lid of the tank.

6. Slide the new fill valve into place and secure the other end with a lock nut with your hand first, then turn it one-quarter way with your adjustable wrench and or rib joint pliers.

Note: A lock nut should have been supplied with your fill valve replacement kit. Do not use the old lock nut.

7. Secure the water supply hose to the fill valve shank—that’s the end sticking out of the tank, where the water supply hose was originally attached.

8. Position the refill tube into the overflow tube—that’s the thin hose sticking out at the top of the fill valve.

Note: If a metal clip came with your fill valve replacement kit, you clip it to the edge of the overflow tube and attach the refill hose to the clip.

9. Turn the water supply by twisting the water supply valve. After the tank fills with water, give the toilet a few flushes, with the bucket still positioned under the water supply hose, to ensure you properly installed the fill valve.

Water Shouldn’t Be Leaking into Your Toilet Boil

If you’re always having problems with your toilet, you need to know whats causing the issue and if you’ll need to get the parts of the toilet repaired or replaced. Having a working toilet is crucial for any home.

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Wrap Up

With all that said and done, your toilet should no longer leak into the toilet bowl. It’s always a faulty fill valve or flush valve. However, if you continue to have a problem with leaking, then you’re experiencing an issue that has nothing to do with either and a professional will need to assist you; otherwise, one of these two solutions would have solved the issue.