How to Control How Much Water Fills in a Toilet Bowl
When all is well, the water level in your toilet bowl is regulated by the level in the tank and toilet's internal S-trap. When the suction that empties the bowl during a flush is broken, the bowl level rises to the height of the trap outlet. At that point, it can't rise any farther because water is draining into the waste line. When the bowl level is too high, the cause is usually a blockage in the waste line. Paradoxically, a blockage can also be responsible for a level that is too low, as can insufficient tank water.
1. Clear blockages in the waste line with a plunger if the bowl level rises too high and threatens to overflow. If the plunger has no effect, insert a toilet auger into the bowl, push it in until you encounter resistance and crank the auger handle. When the auger works its way through the obstruction, the water level in the bowl should drop.
2. Climb on the roof and clear debris from the vent opening. Debris in the vent line blocks air and promotes slow draining and the formation of blockages. If you suspect a blockage farther down the vent pipe, spray water from a garden hose into the vent opening to clear it.
3. Turn off the water to the toilet and hold the flush handle down until the tank empties if the bowl level is too low. Wearing rubber gloves, reach into the bowl opening and remove any toilet paper, tampons or other debris that you find. They can cause a partial blockage that siphons water out of the bowl.
4. Turn the water back on and allow the tank to fill if you don't find any debris in the bowl. Check the water level when the fill valve stops. If it is more than 1 inch below the opening of the overflow tube, there is probably not enough water entering the bowl after a flush to fill it.
5. Adjust the fill level by resetting the float. If the float is on the end of a rocker arm, screw it clockwise to shorten the length of the arm. The arm will exert less pressure on the fill valve and the valve will take longer to close.
6. Reset a collar-style float that fits around the circumference of the fill tube by turning the adjustment screw on top of the float rod counterclockwise with a screwdriver. This lengthens the rod and keeps the valve open longer. Some models feature a clip instead of a screw. On these models, you lengthen the rod by squeezing the clip and pushing the rod down.
7. Make further adjustments to the water level, if necessary, by turning the adjustment screw on top of the fill valve. When you loosen this screw by turning it counterclockwise, the float has to rise higher to close the valve.
Things You Will Need
? Toilet auger
? Garden hose
? Rubber gloves
1. If you have a dog that regularly drinks from the toilet, it may be the cause of a bowl level that is too low. Provide your pet another source of water. Similarly, if you use the toilet infrequently and leave the lid open, water may be evaporating. Close the lid when you aren't using the toilet.
2. Even if you wear rubber gloves, clean and disinfect the bowl before reaching into it to remove blockages.