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    June 7, 2025

    Toilet Running Constantly? Here Is Why and How Much Water You Are Wasting

    Texas Master Plumber

    RMP-39473

    Family-Owned

    Obsta Plumbing, Inc.

    Local Service

    Katy, Houston & Fort Bend County

    A running toilet is one of the most common plumbing complaints we hear from Katy and Houston homeowners. It is also one of the most wasteful. A single running toilet can waste 200 to 400 gallons of water per week, quietly driving up your water bill.

    The Most Common Causes

    1. A worn flapper. The flapper is the rubber seal at the bottom of the tank that lifts when you flush. Over time, it warps, cracks, or collects mineral buildup from our hard water, preventing a tight seal. This is the most common cause of a running toilet, and it is an inexpensive fix.

    2. A misadjusted fill valve. If the fill valve is set too high, water spills into the overflow tube continuously. A simple adjustment usually solves it, but a worn fill valve may need replacement.

    3. A faulty flush valve. The flush valve is the assembly the flapper seals against. If it is cracked or corroded, water leaks past the flapper even when it is in good shape.

    4. A loose or worn chain. If the chain connecting the flapper to the handle is too tight or too loose, the flapper will not seat properly.

    When to Call a Plumber

    If you have tried adjusting the flapper and fill valve and the toilet still runs, or if you notice water pooling around the base, it is time to call a professional. Water at the base often means a failed wax ring, and that can damage your subfloor if left unchecked.

    We repair and replace toilets throughout Katy and Houston. Most running-toilet repairs take less than an hour. Call Obsta Plumbing at (713) 253-4810.

    Need a Plumber in Katy or Houston?

    Call us or submit a service request. We can help determine the right next step for your plumbing situation.

    Learn more about our Toilet Installation & Repair service

    Need a Plumber in Katy or Houston?

    Tell us what is happening and where the property is located. Obsta Plumbing will help determine the appropriate next step.

    Request ServiceCall (713) 253-4810