Installation Guide
7
ENGLISH
FLUSH VALVE SERVICING INSTRUCTIO
(ST453U Model Tank Only)
N
WARNING!
DO NOT USE IN-TANK BOWLCLEANERS.
The use of high concentration of chlorine or chlorine-related products can seriously 
damage fittings in the tank. This damage can cause leakage and property damage. 
TOTO shall not be responsible or liable for any tank fitting failure or damage caused 
by the use of in-tank bowl cleaners.
CARE AND CLEANING
1. Turn off water supply and flush the toilet. Remove 
 the remaining water from tank with a sponge.
2. Remove the tank lid and place it upside down 
 on a clean surface.
3. Pull the clip on top of trip lever gear box as 
 shown.
4. Pull gear box away and set on the side as 
 shown. (see Ill. 1 & Ill. 2)
5. Rotate and pull up on the flush tower to 
 remove it. (see Ill. 3)
6. Remove the grey rubber seal gasket and rinse 
 under running water to clean. (see Ill. 4)
7. Place the gasket back on the flush tower.
8. Align and place the flush tower into housing 
 and gently press to snap and to lock 
 into place.
9. Replace the trip lever gear box and push down 
 on lever to lock it in place.
10. Carefully install the tank lid back on the tank.
11. Flush the toilet several times making sure the 
 trip lever operates normally.
12. Check the water level in the tank and leak.
Ill. 1
Ill. 2
Ill. 3
Ill. 4










