Why Does My Toilet Keep Running? Causes, Fixes

A running toilet wastes water and money. Learn what’s causing the issue and simple ways to stop it. Need help? Call a reliable plumber in Pemberton Township at Mr. Rooter Plumbing of South Jersey for fast, affordable toilet repairs done right the first time.

1. Why Does My Toilet Keep Running? Common Causes
and How to Fix It
A constantly running toilet isn’t just an irritating noise — it’s a silent water waster that can
drive up your utility bill and signal bigger plumbing problems beneath the surface. Most
homeowners have faced this issue at some point, and while it might seem like a small
nuisance, ignoring it can cost you both money and peace of mind.
If you’re dealing with a toilet that won’t stop running, you’re not alone. It’s one of the most
frequent plumbing complaints in homes across the country. But what causes this issue, and
how can you fix it? In this guide, we’ll break down the possible reasons your toilet keeps
running, how you might be able to resolve it yourself, and when it’s time to call a plumber
in Pemberton Township for professional help.
How a Toilet Works (and Why It Might Keep Running)
Before we dive into fixes, it’s helpful to understand the basic components of your toilet’s
inner workings. Inside the tank, a few key parts control the water flow and flushing process:

2. ●Flapper: A rubber seal that lifts when you flush, releasing water into the bowl.
●Fill Valve: Refills the tank with water after each flush.
●Float: Rises with the water level and signals the fill valve to shut off.
●Overflow Tube: Prevents water from overflowing by directing excess water into the
bowl.
When these parts function properly, your toilet flushes cleanly, refills, and stops. But when
something goes wrong, water can continuously flow from the tank to the bowl — causing
that frustrating, wasteful running sound.
Common Reasons Your Toilet Keeps Running
Let’s look at the most frequent causes of a constantly running toilet:
1. Worn-Out or Misaligned Flapper
The flapper creates a watertight seal at the bottom of the tank. Over time, it can warp,
crack, or become misaligned. If it doesn’t sit properly, water will leak into the bowl, causing
the fill valve to run endlessly to replace it.
Solution:
Turn off the water supply to the toilet and remove the old flapper. Replace it with a new,
compatible model (available at hardware stores). Make sure it fits snugly and moves freely.
2. Chain Too Tight or Too Loose
The chain connecting the flush lever to the flapper can be a source of trouble if it’s
improperly adjusted. If it’s too tight, the flapper won’t fully close. If it’s too loose, the
flapper may not lift properly when you flush.
Solution:
Adjust the chain length so there’s a little slack but not so much that it gets caught under the
flapper.
3. Faulty Fill Valve
If your toilet’s fill valve doesn’t shut off when the tank reaches the proper water level, water
will continuously flow into the tank and out through the overflow tube.

3. Solution:
You might be able to adjust the fill valve’s float height to control the water level. If
adjustment doesn’t work, replacing the fill valve assembly is a straightforward fix for most
DIYers.
4. Float Position Issues
The float controls when the fill valve shuts off. If the float is set too high, water spills into the
overflow tube, creating a constant running situation.
Solution:
Adjust the float mechanism. In older toilets, this may involve bending a metal rod; in newer
models, you can often turn a screw or slide the float down a rod.
5. Sediment Buildup
Hard water deposits or debris can clog the fill valve or affect the flapper’s seal, causing a
poor fit and water leaks.
Solution:
Clean the fill valve components and flush out any debris. If the buildup is extensive,
replacement parts may be necessary.
Signs It’s Time to Call a Professional Plumber
While minor toilet issues are often DIY-friendly, certain situations call for a licensed plumber
in Pemberton Township:
●You’ve tried replacing the flapper or fill valve, and the problem persists.
●You notice water pooling around the base of the toilet.
●There’s frequent clogging or slow flushing in addition to the running issue.
●You suspect hidden leaks in your plumbing system.
●You’re uncomfortable tackling plumbing repairs on your own.
An experienced plumber can diagnose the issue quickly, repair or replace faulty
components, and check for underlying problems that might be contributing to your
plumbing woes.

4. Why a Running Toilet Should Never Be Ignored
You might think a running toilet is a minor annoyance — but it can lead to bigger problems if
left unchecked:
●Water Waste: A constantly running toilet can waste up to 200 gallons of water per
day, drastically increasing your utility bill.
●Plumbing Damage: Persistent leaks and overflows can strain your plumbing system,
potentially leading to costly repairs.
●Environmental Impact: Water conservation is a growing concern, and a leaky toilet
contributes to unnecessary water consumption.
Fixing the problem promptly helps protect your home, wallet, and the environment.
Preventing Toilet Troubles in the Future
The best way to avoid running toilet issues is with regular maintenance and a little extra
care. Here’s how:
●Inspect your toilet’s tank parts every six months for wear, alignment, and buildup.
●Avoid using harsh chemical cleaners inside the tank, as they can damage rubber
parts.
●Address minor toilet issues promptly to prevent them from escalating into bigger
problems.
●Flush only waste and toilet paper — never flush wipes, paper towels, or hygiene
products.
●Schedule annual plumbing inspections to catch hidden issues before they worsen.
When You Need a Trusted Plumber in Pemberton Township
If your toilet won’t stop running or you’re dealing with other plumbing issues, don’t waste
time or water trying to handle it alone. A licensed plumber in Pemberton Township can
accurately diagnose the problem, make the necessary repairs, and ensure your plumbing
system is in top condition.

5. That’s where Mr. Rooter Plumbing of South Jersey comes in. Our professional, courteous
team specializes in residential and commercial plumbing services, including toilet repairs,
drain cleaning, leak detection, and water heater maintenance. We offer upfront pricing,
clean, efficient service, and 24/7 emergency support for your peace of mind.
When plumbing problems disrupt your day, trust Mr. Rooter Plumbing of South Jersey to
restore order quickly and affordably. Contact us today to schedule your service and
experience why local homeowners rely on us for dependable, long-lasting plumbing
solutions.