How to Increase Toilet Flush Power

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When a toilet is flushed, a plate at the bottom of the tank rises causing water to be siphoned upwards over the u-bend down toward the flush pipe and into the toilet bowl. As a result of the water level dropping in the tank, the float and float arm drop pulling the float valve open. The water then refills. The flush motion of a tank is probably the most overworked plumbing component used. Occasional servicing is highly recommended to keep it working properly and flushing well.

Things You'll Need

  • Set of screwdrivers
  • String
  • Replacement float
  • Mirror
  • Toothpick
  • Open the main water supply tap fully to make sure that the water is flowing at maximum capacity.

  • Lift the tank lid and check that the water level is filled up to the pre-marked level inside the tank. Ideally, this should be about 1 inch below the overflow pipe outlet.

  • Low water levels in the tank mean that there is less energy to flush. If the water level is too low, it can be adjusted by moving the sliding device that is connected to the float arm. If there is no sliding device, then it is possible to adjust the screw that is situated between the float valve and the float arm. Turn it clockwise to lower the water level and counterclockwise to raise it.

  • If the water levels are not the cause of the problem, lift the tank lid to locate the arm (rod) of the float valve, and tie it up with string. Then flush. The tank will now be empty leaving the float visible. If the float contains water, it will need to be replaced by unscrewing it and screwing on a new one.

  • If there is still no improvement in the flush power of the toilet, check for blockages in the flapper valve, which is located in the bottom of the tank. These can usually be removed by hand.

  • Also, using a mirror, check the small holes underneath the toilet bowl rim. If the holes are blocked with lime scale, a wooden toothpick can be used to carefully remove it.

  • Untie the float arm, replace the tank lid and then flush.

Tips & Warnings

  • To check if you have a leaking flapper valve, put a small amount of food coloring into the tank. If any of the coloring ends up in the toilet bowl before flushing, then you have a leak.
  • When removing the tank lid, lay it on the floor. If you lean it against the wall it may slip and crack.
  • Do not overtighten the float or any screws, as this may cause cracks in the plastic or porcelain components of the toilet.

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References

  • "Collins Complete DIY Manual"; Albert Jackson, David Day; 2004
  • Photo Credit toilette image by pucci raf from Fotolia.com
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