Water Trickling into Toilet Bowl: Causes and Solutions

When a toilet bowl starts to flow the water drip it is called water trickling into the toilet bowl. If your toilet bowl has a slightly aperture it is called trickling. Water trickling into the toilet bowl is not only bothersome but it also wastes water.

Weeny leakage, clogged or rusted valves, damaged flapper, or cracked supply lines can cause this problem.  Some of the problems you can handle easily when some need experts to solve. Let’s know about the causes and figure out if you can conduct the trickling problem on your own.

Water Trickling into Toilet Bowl

Causes and Solutions of Water Trickling

  1. Damaged tank The toilet holds water for flushing in a water tank. When the tank is cracked or damaged, water will drip from the tank. Nearby your commode it will be wringing wet. You will hear a gurgling sound coming from the tank.

The water level in the tank will be very low from the normal level. The flush won’t work properly because of the insufficiency of water. Sometimes Water can overflow from the tube. By these indications, you can understand that your toilet tank is cracked.

If the tank is damaged badly, it would be best to replace it with a new one. If the tank has a tiny leakage, you can use white cement or putty to cover it. Make sure to drain all the water from the tank before repairing it. But if you don’t have a two-piece toilet you will have to replace the whole toilet.

  1. Cracked supply lines In a toilet tank water drifts from a water supply line. The water line stays closed when the water flows to the tank to prevent air coming in the system. The supply line can crack due to high water pressure or sudden change of directions of the water flow.

Empty water tank is a sign of a cracked pipe. Water flooding inside the bathroom is also a cue to crusty line. There will be a loud popping sound coming from a damaged water line system.

If the line is not fully damaged, you can change or repair it by yourself. First, stop the water supply of your toilet otherwise the bathroom will be flooded by water. Then carefully dispel the cracked line. Now replace it with a new coated line. If the pipe is damaged a little or has a leakage, you can seal it with ‘Flex Seal’.

  1. Rusted valves If the tank overflows unsteadily it is because of a rusty valve. Water flow in the tank is controlled by some valves that are connected to the toilet water system. So when the valves get rusted the tank can’t hold the right amount of water.

By engine braking test, cold water test and a clicking sound on the valve you can identify a rusted valve.

If the tank overflows and the water can’t be stopped, shut off the valve. Sometimes the rubber stops or seals the valve from normal flowing. In this situation, you can change the rubber of the valve. Cleaning the valves with hot water also gives a good result at times.

  1. Damaged Flapper Flapper is a rubbery or plastic part of a toilet bowl which controls the water flow from the tank to the bowl. It replenishes the tank after flushing. Since it’s a rubbery part, it can crumble or warp. A broken flapper can’t control the water drifts between the toilet tank and toilet bowl.

To fix the flapper, first shut the incoming water. Remove the tank lid and press or hold the tank lever down. If you do so, all water will come out from the tank. Now intercept the chain that is connected to the flapper and remove the flapper. Set a new flapper and connect the chain. Turn on the water supply and check if the system is working correctly.

  1. Bad Float: The float monitor’s the water level of a toilet tank. It helps the tank to hold the normal level of water after every flush. If the float reaches its exclusion point but the tank keeps filling water, it means the float has gone bad.

To fix the bad float, flush the toilet and notice if the float is working on level. Tap the top of the carburetor with a screwdriver handle. If it’s going up or down from it’s normal level, simply change it. It doesn’t need much tools to change and a float is nor expensive.

So you better not try to fix it if it’s not working. That can cause chaos in the tank.

  1. Broken Connectors Toilet has many connectors to connect the tank to the building’s water system so that the flush can be used at any time. When a connector leaks, a trickling problem occurs. When water overflows from the tube of the water system, it is caused by a broken connector.

Don’t over-tighten the nuts of the connector. It can break the connector.

Check the connectors of your water system once or twice in six months. If your connector has tiny leaks you can use putty to close it. Otherwise, you can’t change a connector easily. Maybe you need an expert’s help to solve this problem.

How do I stop my toilet bowl from trickling?

Check the float, connectors, and valves if any leakage occurred. Make sure your water system lines do not get clogged or broken. Reset the float to its normal level. Sometimes you just need to flush the sewage away and plump the toilet.

How do you know if your toilet is running?

There are some instances that point to a running toilet. A hissing sound comes from a running toilet which is not quite normal. The water will be trickling down to the sides of the water tank after a long time of flushing. Also, the toilet handle will be jiggling.


So these are the main causes of water trickling into the toilet bowl. Water trickling can damage your whole water system as it continually drops water from the bowl. It can also cause a sudden overflow of water inside the house and start chaos. So you should not take these problems lightly. If you can’t solve any of the problems on your own, make sure to call an expert and repair the system.

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