Why Does My Toilet Keep Running? | Plumbing Masters

Why Does My Toilet Keep Running?

A toilet that won't stop running might seem like a small annoyance, but it can waste hundreds of gallons of water every day and send your water bill soaring.

Fortunately, many running toilets have straightforward causes—and catching the problem early can save you money.

1. A Worn Flapper

The rubber flapper inside the tank creates a watertight seal after every flush.

Over time it can:

  • Warp
  • Crack
  • Become brittle
  • Collect mineral buildup

When it no longer seals properly, water continuously flows into the bowl.

2. A Faulty Fill Valve

The fill valve controls how much water enters the tank after flushing.

When it wears out, the toilet may:

  • Run constantly
  • Refill repeatedly
  • Make hissing noises
  • Overflow into the overflow tube

3. Float Problems

If the float is set too high, water continually spills into the overflow tube.

If it's too low, your toilet may not flush completely.

Fortunately, float adjustments are often simple.

4. Mineral Buildup

Hard water common in Oklahoma can cause calcium deposits to interfere with moving parts inside the tank.

Cleaning or replacing components may restore proper operation.

5. Old Toilet Components

Most toilet parts wear out over time.

If you've replaced multiple components over the years, installing a new toilet may be the more cost-effective long-term solution.

How Much Water Can a Running Toilet Waste?

Depending on the severity, a running toilet can waste hundreds of gallons every day—adding hundreds of dollars to your annual water costs.

Simple Food Coloring Test

Add a few drops of food coloring to the toilet tank.

Wait 15 minutes without flushing.

If color appears in the bowl, water is leaking past the flapper.

When Should You Call a Plumber?

Call Plumbing Masters if:

  • The toilet keeps running after replacing the flapper.
  • Water leaks around the base.
  • The toilet rocks when you sit down.
  • Multiple toilets have similar issues.
  • You're unsure what's causing the problems

 

Frequently Asked Questions

Can a running toilet increase my water bill?

Absolutely. It's one of the most common causes of unexpectedly high water bills.

Can I fix a running toilet myself?

Simple issues like replacing a flapper may be DIY-friendly, but persistent problems often require professional diagnosis.

Stop Wasting Water

A running toilet isn't just annoying—it's costing you money every single day.

Plumbing Masters can quickly diagnose the issue, make the repair, and help you avoid unnecessary water waste.

Real Plumbers. Real Solutions.