Why Does My Toilet Keep Running? Common Plumbing Causes

May 1, 2026 | Lalonde Plumbing

Why Does My Toilet Keep Running? Common Plumbing Causes

That constant sound of running water coming from your bathroom isn’t just annoying; it’s literally money going down the drain. If your toilet keeps running long after you flush, you’re not alone. This common toilet plumbing issue affects countless Rochester-area homeowners, and understanding what’s causing it is the first step toward a solution.

A running toilet can waste hundreds of gallons of water each day, significantly impacting your utility bills. The good news? Most causes are straightforward to diagnose, and professional bathroom plumbing repair can stop the waste quickly.

What Causes a Toilet to Keep Running?

1. Worn or Faulty Flapper

The flapper is the rubber seal at the bottom of your toilet tank that controls water flow into the bowl. Over time, flappers deteriorate, warp, or develop mineral buildup, which is especially common in Rochester’s hard water areas. When the flapper doesn’t seal properly, water continuously leaks from the tank into the bowl, triggering the fill valve to keep running. This is one of the most frequent reasons homeowners search for running toilet repair in Rochester services.

2. Malfunctioning Fill Valve

The fill valve controls the water level in your tank. When it malfunctions, it may not shut off properly once the tank reaches capacity. This issue can stem from worn internal components, sediment buildup, or simple age. Older homes throughout Brighton and Pittsford often have original fixtures that eventually need a plumber Rochester, NY homeowners trust.

3. Float Height Problems

The float tells your toilet when to stop filling. If it’s positioned too high or becomes waterlogged, the tank overfills and water spills into the overflow tube. Adjusting the float might seem simple, but improper positioning can create new problems or mask underlying issues that require professional residential plumbing services.

4. Damaged Overflow Tube

This vertical tube prevents your tank from overflowing by directing excess water into the bowl. Cracks or improper height settings can cause continuous running. While less common, this issue requires professional assessment to prevent water damage.

5. Deteriorating Tank Components

Rochester’s temperature fluctuations and water quality affect plumbing fixtures over time. Rubber washers, gaskets, and seals naturally degrade, especially in homes with original bathrooms. What starts as a minor leak can escalate into a toilet that keeps running constantly.

The Hidden Cost of Ignoring Toilet Plumbing Issues

Many homeowners delay addressing these problems, thinking they’re minor inconveniences. However, a running toilet can waste 200+ gallons daily. That is over 6,000 gallons monthly.

Beyond inflated water bills, constant running can cause serious issues:

  • Damage internal tank components further
  • Increase wear on your entire plumbing system
  • Lead to more expensive repairs down the road
  • Waste valuable water resources in our community

When to Call a Professional Plumber

While some homeowners attempt DIY fixes, toilet repairs often require experienced assessment. A professional plumber Rochester NY residents trust can quickly identify the root cause, whether it’s a simple flapper replacement or a sign of deeper plumbing concerns.

At Lalonde Plumbing, we’ve repaired countless running toilets throughout the Rochester suburbs. We understand how local water conditions affect your fixtures and can provide lasting solutions, not temporary patches. Our experienced team provides reliable toilet repair services that ensure your toilet operates efficiently for years to come.

Get Your Running Toilet Fixed Today

Don’t let a running toilet continue to waste water and money. Lalonde Plumbing provides fast, reliable plumbing services throughout Rochester, Brighton, Pittsford, and surrounding communities. Our experienced plumbers diagnose the issue quickly and provide honest, straightforward solutions you can count on.

Ready to stop the waste? Contact Lalonde Plumbing today for the trusted running toilet repair Rochester homeowners have depended on for years.