How to Repair a Toilet Inlet Valve

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A toilet inlet valve is located inside of the tank, and is the mechanism that allows water to flow into the tank. The main problem that can occur with an inlet valve is blockage from mineral deposits. Located in the top of the inlet valve is a seal. The seal becomes clogged and begins to block the flow of water. To repair the problem, the inlet valve seal must be flushed out. If there is still a problem with water flow, the seal will need to be replaced.

Things You'll Need

  • Philips head screwdriver
  • Shut off the water supply to the toilet by turning the shutoff valve to the right as far as it will go. The shutoff valve is located on the wall behind the toilet. Lift the lid off of the tank and set it aside.

  • Loosen and remove the top of the inlet valve. Inlet valves are not all constructed the same way, which means the top of the inlet valve may come off differently. Some twist on and some screw on.

  • Raise the arm of the inlet valve and twist the top counterclockwise to loosen it, or loosen and remove the screws in the top of the valve.

  • Lift and lay over the twist off top and lift off the screw on top. Place a small bowl or cup over the top of the inlet valve and turn the shutoff valve back on. This will allow water to flow through the inlet valve, but keep it spewing out of the tank. Removing the top will help to flush out mineral deposits in the inlet valve. After flushing out the inlet valve, turn the water supply back off.

  • Remove the seal from inside of the top of the inlet valve and replace it. To get the right seal, take the old one with you to the local home remodeling center or a plumbing supply store. Insert the new seal, and secure the top of the inlet valve back in place.

  • Turn the water supply back on and check to make sure that the inlet valve is filling properly, and that it is shutting off after the toilet has been flushed and refilled.

Tips & Warnings

  • Toilet inlet valves are an inexpensive toilet part. Sometimes it is better to just replace the entire inlet valve.

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References

  • Photo Credit toy toilet image by Wayne Abraham from Fotolia.com
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