February 3, 2026

Top Causes of Running Toilets

February 3, 2026

One of the frustrating issues you may encounter in your home is a running toilet. While it may not seem serious, it can quickly add to your utility costs and hurt your wallet. That is why you should contact a plumber in Northridge, CA from Roberts Plumbing Hydro Jet & Rooter immediately the moment you experience it.


Luckily, running toilets are easy to fix and relatively cheap. To help you get into the root of the problem, here are the top causes of running toilets:

FAULTY TOILET FLAPPER

When the toilet flappers chip or wear out, they become less efficient sealing the flush valve. As a result, they allow water to pass continuously from the toilet tank into the bowl. Seek professional plumbing repairs right away to have your toilet flappers replaced.

LEAKING FILL VALVE

Another reason why your toilet is running is due to a leaky fill valve. To confirm if this is causing the problem, flush the toilet and raise the float arm while the tank is refilling itself. If the water doesn’t stop filling the tank and gets past the overflow tube, have your go-to plumbing company change the fill valve.

FLAPPER CHAIN

In some cases, the flapper chain may be too short or too long, which keeps the flapper seal from properly closing. If the chain is too long, it may interfere with the flapper seal and prevent it from creating a watertight seal. Meanwhile, if the chain is too short, the flapper seal may not shut, thus making your toilet run. A simple way to fix this is to adjust the length of the flapper chain.

BROKEN TOILET HANDLE

If you flush your toilet and the toilet handle doesn’t turn up, your toilet will not stop running. When this happens, your toilet handle may be stiff or corroded. Have a technician loosen the handle so it won’t stick in place or replace it if it’s already beyond repair.

In case of a running toilet or other issues, don’t hesitate to contact Roberts Plumbing Hydro Jet & Rooter for top-quality plumbing services. Get in touch with our team to schedule an appointment and we’ll be ready to assist you.

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