Essentials of Plumbing Lesson

ADJUSTING FLUSHING MECHANISMS

The water closet is now installed with water and water connections. Turn on water supply, and open shutoff valve for water flow into the flush tank. Flush the tank several times to check the height of the water level in the flush tank. The water level should be about 1 inch below the top of the overflow pipe.

Adjustments for ball cock type flushing mechanism. Use the following steps to adjust a ball cock type flushing mechanism (see Figure 32):

FIGURE 32. ADJUSTING BALL COCK MECHANISM

For incomplete or erratic flushing, adjust handle and trip arm, connecting wire, lift wire, guide holder, and flush ball.
Adjust water level by bending the ball float rod.
After adjustments are made, flush the tank several times, observing operation.
Then place top on flush tank.

Adjustments for a plastic float cup flushing mechanism. Use the following steps to adjust a plastic float cup flushing mechanism (see Figure 33):

FIGURE 33. ADJUSTING PLASTIC FLOAT CUP MECHANISM

For incomplete or erratic flushing, adjust handle and tip arm, chain, and flapper ball with guide holder.
Adjust water level by moving adjustment clip up or down on the pull rod.
After adjustments are made, flush the tank several times, observing operation.
Then place top on flush tank.