How to Troubleshoot a Pressure Flush Toilet

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Unlike traditional toilets, which use gravity to pull water from the toilet tank, a pressure flush toilet draws water using a pressurized valve. This uses less water while cleaning the toilet bowl faster and more thoroughly. While pressure flush toilets typically work better than gravity toilets, they can still encounter problems. Learn how to troubleshoot and fix these problems to restore the toilet's functionality.

  • Check that your home's water pressure is normal. Low water pressure causes less water to flow through your pipes and directly affects bathroom appliances such as your sink, shower and toilet. Most homes have a line-in pipe where the main water line delivers water to the home. Ensure this line is open and hasn't been manually closed. In addition, local construction or pipe damages in your neighborhood may temporarily decrease home water pressure and affect your pressure flush toilet. Call your local water utility company to determine if this may be a factor.

  • Check the toilet's pressure chamber. Whereas traditional toilets use a flapper ball and chain to draw water, pressure flush toilets have a plastic pressurized chamber in the toilet tank. Inspect it for cracks or leaks, which may decrease pressure and cause weak flushing or no flushing. If a crack is found, you may patch it by applying PVC joint solvent cement over the crack or calling your toilet's manufacturer.

  • Empty the toilet tank of water and inspect the bottom of the pressure chamber where it meets the porcelain. The intersection is cushioned with a rubber ring. Ensure that the rubber ring is not cracked or missing, as this may cause leaks and poor pressure.

  • Clean the underside of the inside of the toilet bowl where the pressurized water is dispensed. Debris and other material may have built up and physically blocked the outlet holes, reducing water flow. Clean the toilet thoroughly and resume use.

Tips & Warnings

  • Old pressurized toilets were once avoided due to their loud flushing noise, but modern pressure flush toilets are typically no louder than standard gravity flush toilets.

References

  • Photo Credit Peter Gerecs
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