Why Your Toilet Keeps Running and Wasting Water

What Causes a Toilet To Keep Running?

Several internal components work together to control the water flow in your toilet. If any of these plumbing parts fail or become misaligned, the water will not stop flowing into the bowl after a flush. The most frequent problems happen with the flapper, fill valve, or overflow tube.

Faulty Flapper

The flapper is a rubber seal at the bottom of the tank that lifts when you flush. A worn flapper seal may allow water to leak from the tank into the bowl.

Plumbers test this component by adding food coloring to the tank water. If you haven’t activated the flushing mechanism and the color leaches into the main bowl within 15 minutes, it’s likely a damaged flapper or a leaking flush valve. Luckily, replacing a flapper is simple.

Fill Valve Issues

Another common cause of water leaks is a faulty fill valve, which controls how much water enters the tank after each flush. When this component malfunctions, it may not shut off properly. Fill valve issues generally result from mineral buildup or worn internal parts.

Water Level Adjustment

Why does my toilet keep running? Sometimes, the water level sits too high, and the contents of the tank keep spilling into the overflow tube. If you hear a constant running water sound, your plumber might try adjusting the tank’s float arm or float cup to lower the water level to about one inch below the overflow tube opening.

Overflow Tube Problems

The overflow tube’s job is to prevent the tank water from spilling onto your bathroom floor. If the float doesn’t shut off the fill valve at the right time, water will continuously drain through this tube. A plumber will need to check why the water is filling up too much and make the necessary repairs or parts replacements.

Common Warning Signs of Toilet Issues

Beyond the sound of running water, several indicators suggest your toilet needs attention:

• Higher bills: Unexplained increases in your monthly water usage often point to toilet leaks.
• Constant refilling: Water flowing into the tank continuously points to component failures that need replacement.
• Weak flushes: Insufficient water in the tank results in incomplete flushes and risks overflowing toilets.

Are you still asking, “Why does my toilet keep running?” Don’t wait to call a plumber.

Get Expert Help From MN Plumbing & Home Services

If you’ve noticed a gurgling toilet along with running water, your property may have multiple plumbing issues. Call MN Plumbing & Home Services today at (952) 522-2231 to schedule your toilet repair in Burnsville, MN, or the surrounding areas.